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Schema Browser

Find detailed descriptions of the data available in each data release

The Schema Browser displays an extensive explanation of each type of data product each survey/archive offers, along with any relevant analysis and publication information (see also individual survey documentation for more info). For more information on the schema browser, go to the Schema Browser Documentation. For more information on the data products within the schema browser, go to the team's documentation on Data Central (the link for each survey can be found in the Meta box below).

2dFGRS
6dFGS
GAMA
OzDES

2dFGRS

The 2dF Galaxy Redshift Survey (2dFGRS) is a major spectroscopic survey taking full advantage of the unique capabilities of the 2dF facility built by the Anglo-Australian Observatory. The 2dFGRS is integrated with the 2dF QSO survey (Croom et al., 2004). The 2dFGRS obtained spectra for 245591 objects, mainly galaxies, brighter than a nominal extinction-corrected magnitude limit of bJ=19.45. Reliable (quality>=3) redshifts were obtained for 221414 galaxies. The galaxies cover an area of approximately 1500 square degrees selected from the extended APM Galaxy Survey in three regions: a North Galactic Pole (NGP) strip, a South Galactic Pole (SGP) strip, and random fields scattered around the SGP strip. Redshifts are measured from spectra covering 3600-8000 Angstroms at a two-pixel resolution of 9.0 Angstrom and a median S/N of 13 per pixel. All redshift identifications are visually checked and assigned a quality parameter Q in the range 1-5; Q>=3 redshifts are 98.4% reliable and have an rms uncertainty of 85 km/s. The overall redshift completeness for Q>=3 redshifts is 91.8% but this varies with magnitude from 99% for the brightest galaxies to 90% for objects at the survey limit (Colless et al., 2007).

Data Release
Final Data Release

Final Data Release

Data
Catalogues
Spectra

Groups
Definitive
Key
Data Central Generated

Definitive

name: Definitive | type: CatalogueGroup | Matthew Colless [javascript protected email address] | version 1 |

All the available information

Tables
phot_all
spec_all

phot_all

name: phot_all | type: CatalogueTable | Matthew Colless [javascript protected email address] | version 1 |

All the photometric information

Address this table as 2dfgrs_fdr.phot_all

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
SRSB	None	Supercosmos R vrs Bj match classification	meta.code
SRQUAL	None	Quality flag	meta.code.qual
SRBLEND	None	Deblending flag	meta.code
SRSIGMA	None	Profile classification statistic	stat.value
SRCLASS	None	Classification flag	meta.code
SRPA	deg	Celestial position angle	pos.posAng
SRBI	0.01 microns	Weighted semi-minor axis	phys.angSize.sminAxis
SRAI	0.01 microns	Weighted semi-major axis	phys.angSize.smajAxis
SRAREA	pixels	Total area	phys.area
SRRMAG	mag	UK-J (R) magnitude	phot.mag;em.opt.R
SRDEC	deg	Object declination (J2000.0)	pos.eq.dec
SRRA	deg	Object RA (J2000.0)	pos.eq.ra
SBAPM	None	APM-Supercosmos Bj-band match classification	meta.code
SBQUAL	None	Quality flag	meta.code.qual
SBBLEND	None	Deblending flag	meta.code
SBSIGMA	None	Profile classification statistic	stat.value
SBCLASS	None	Classification flag	meta.code
SBPA	deg	Celestial position angle	pos.posAng
SBBI	0.01 microns	Weighted semi-minor axis	phys.angSize.sminAxis
SBAI	0.01 microns	Weighted semi-major axis	phys.angSize.smajAxis
SBAREA	pixels	Total area	phys.area
SBBJMAG	mag	UK-J (Bj) magnitude	phot.mag;em.opt.B
SBDEC	deg	Object declination (J2000.0)	pos.eq.dec
SBRA	deg	Object RA (J2000.0)	pos.eq.ra
VISCOMM	None	Visual check comments	meta.note
VISCHECK	None	Visual check flag	meta.code
GALEXT	mag	Galactic extinction	phys.absorption
BJG_100	mag	bj without extinction correction (100k)	phot.mag;em.opt.B
BJSEL100	mag	bj mag used in the object selection (100k)	phot.mag;em.opt.B
BJG_OLD	mag	Original bj magnitude without extinction correction	phot.mag;em.opt.B
BJSELOLD	mag	Original bj magnitude with extinction correction used in the object selection	phot.mag;em.opt.B
OBJDEC	radians	Dec in radians	pos.eq.dec
OBJRA	radians	RA in radians	pos.eq.ra
OBJEQNX	None	Equinox of the plate reference frame	time.equinox
REGION	None	GSSS Region name	obs.field
IFIELD	None	UKST field	obs.field
BJG	mag	Final bj magnitude without extinction correction	phot.mag;em.opt.B
AREA	pixels	Isophotal area in pixels	phys.area
ECCENT	None	Eccentricity	src.morph.param
ORIENT	deg	Orientation in degrees clockwise from E-W	pos.posAng
JON	None	Eyeball class flag	src.class
IGAL	None	Final class flag (equals 1 for a galaxy)	src.class.starGalaxy
PARMU	None	mu classification parameter	src.morph.param
PARK	None	k classification parameter	src.morph.param
PROB	None	psi classification parameter	src.morph.param
BJSEL	mag	Final bj mag used in the object selection	phot.mag;em.opt.B
APMEQNX	None	Equinox of RA and Dec	time.equinox
DEC	radians	Dec in radians	pos.eq.dec
RA	radians	RA in radians	pos.eq.ra
NAME	None	2dFgg assigned name	meta.id
SEQNUM	None	Sequence number: Database Primary Key	meta.id
extnum	None	Extension number	meta.code
spectra	None	Number of spectra for this object	meta.number
best	None	In extension 0, extension number with best spectrum; in extension>0, 1 if best spectrum and 0 otherwise	meta.code
UKST	None	UKST sky survey field number	obs.field
b2	deg	Galactic latitude	pos.galactic.lat
l2	deg	Galactic longitude	pos.galactic.lon
dec2000	dd mm ss.ss	DEC (J2000) in DD MM SS.S	pos.eq.dec;meta.main
ra2000	hh mm ss.ss	RA (J2000) in HH MM SS.SS	pos.eq.ra;meta.main
dec	dd mm ss.ss	DEC (B1950) in DD MM SS.S	pos.eq.dec
ra	hh mm ss.ss	RA (B1950) in HH MM SS.SS	pos.eq.ra
name	None	2dFGRS name	meta.id;meta.main
delta	radians	Dec. (B1950) in radians	pos.eq.dec
alpha	radians	R.A. (B1950) in radians	pos.eq.ra
serial	None	2dFGRS serial number	meta.id

spec_all

name: spec_all | type: CatalogueTable | Matthew Colless [javascript protected email address] | version 1 |

All the spectroscopic information

Address this table as 2dfgrs_fdr.spec_all

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
OBSDECJ2000	deg	Observed Dec (J2000)	pos.eq.dec
OBSRAJ2000	deg	Observed RA (J2000)	pos.eq.ra
SNR	None	Median signal-to-noise ratio per pixel	stat.snr;stat.median
REFEXP	s	Exposure time (secs) of reference run	obs.exposure
REFRUN	None	AAT Run number of reference frame	obs.param
NCOMB	None	Number of frames combined	meta.number
OBSFLD	None	2dF observed field number	obs.field
PID	None	2dF pid	meta.code
PTRTYPE	None	2dF ptrtype	meta.code
THETA	deg	2dF fibre angle	instr.param
OBJMAG	mag	2dF object magnitude	phot.mag
OBJYERR	pixels	2dF object y position error	stat.error;pos.cartesian.y
OBJXERR	pixels	2dF object x position error	stat.error;pos.cartesian.x
OBJY	pixels	2dF object y position	pos.cartesian.y
OBJX	pixels	2dF object x position	pos.cartesian.x
LAMBDAC	Angstrom	Central wavelength	em.wl.central
GRATANGL	deg	2dF grating angle	instr.param
GRATBLAZ	None	2dF grating blaze direction	instr.param
GRATLPMM	None	2dF grating line per mm	instr.param
GRATID	None	2dF grating ID	meta.id;instr
SPECTID	None	2dF spectrograph ID	meta.id;instr
UTDATE	YYYY:MM:DD	UT date of observation	time.epoch;obs
GRS_DATE	None	2dF YYMMDD observed date; -99 if none	time.epoch
OBSRUN	None	Observation run	obs.param;obs
FIBRE	None	2dF fibre number	obs.param
PIVOT	None	2dF pivot number	obs.param
PLATE	None	2dF plate number (0 or 1); -99 if none	obs.param
SPFILE	None	2dF reduced data file	meta.file
THPUT	None	Fibre Throughput	instr.param
Z_COMM	None	Observers Comment	meta.note
IALTER	None	No idea	meta.cryptic
Q_FINAL	None	Suggested quality for redshift	meta.code.qual
Q_Z_ABS	None	Cross-correlation quality	meta.code.qual
Z_ABS	None	Cross-correlation redshift	stat.fit.param
R_CRCOR	None	Cross-correlation peak	stat.fit.param
KBESTR	None	Cross-correlation template from best spectrum	stat.fit.param
Q_Z_EMI	None	Emission redshift quality	meta.code.qual;src.redshift
Z_EMI	None	Emission redshift	src.redshift;pos.heliocentric
NGOOD	None	Number of good emmision lines	meta.number
NMBEST	None	Number of emission lines for Z_EMI	meta.number
ABEMMA	None	Redshift type (abs=1, emi=2, man=3)	meta.code;src.redshift
QUALITY	None	Redshift measurement quality	meta.code.qual;src.redshift
Z_HELIO	None	Heliocentric corrected redshift	src.redshift;pos.heliocentric
Z	None	Raw measured redshift	src.redshift
MATCH_DR	arcsec	Position match dr in arcsec	pos.angDistance
OBSDEC	radians	Observed Dec	pos.eq.dec
OBSRA	radians	Observed RA	pos.eq.ra
OBSNAME	None	Observed object name	meta.id
extnum	None	Extension number	meta.code
spectra	None	Number of spectra for this object	meta.number
best	None	In extension 0, extension number with best spectrum; in extension>0, 1 if best spectrum and 0 otherwise	meta.code
quality	None	Redshift quality parameter (quality=1-5; reliable redshifts have quality>=3)	meta.code.qual;src.redshift
abemma	None	Redshift type (abs=1,emi=2,man=3)	meta.code;src.redshift
z_helio	None	Heliocentric redshift	src.redshift;pos.heliocentric
z	None	Observed redshift	src.redshift
fiber	None	2dF fiber	obs.param
plate	None	2dF plate	obs.param
pivot	None	2dF pivot	obs.param
TDFgg	None	2dFGRS field number (+NGP,-SGP)	obs.field
obsrun	None	Observing run year and month	obs.param;obs
UKST	None	UKST sky survey field number	obs.field
name	None	2dFGRS name	meta.id;meta.main
serial	None	2dFGRS serial number	meta.id

Key

name: Key | type: CatalogueGroup | Matthew Colless [javascript protected email address] | version 1 |

A subset of astrophysically-important information

Tables
phot_key
spec_sum
spec_key
spec_best

phot_key

name: phot_key | type: CatalogueTable | Matthew Colless [javascript protected email address] | version 1 |

Key photometric information

Address this table as 2dfgrs_fdr.phot_key

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
100BJSEL	mag	100k release bj magnitude with extinction correction (prior to re-calibration to BJSEL)	phot.mag;em.opt.B
100_BJG	mag	100k release bj magnitude without extinction correction (prior to re-calibration to BJG)	phot.mag;em.opt.B
BJSELOLD	mag	Original bj magnitude with extinction correction (prior to re-calibration to BJSEL); used to select survey sample	phot.mag;em.opt.B
BJG_OLD	mag	Original bj magnitude without extinction correction (prior to re-calibration to BJG)	phot.mag;em.opt.B
NAME	None	2dFGRS assigned name; if either (i) BJSELOLD is fainter than 19.45, or (ii) the object could not be allocated to a fibre by the configuration algorithm, then NAME is blank	meta.id
IGFIELD	None	Galaxy number in UKST field	meta.number
IFIELD	None	UKST field	obs.field
REDMAG	mag	Not used	phot.mag;em.opt.R
SMAG	mag	Unmatched raw stellar mag (from APMCAL)	phot.mag
FMAG	mag	Unmatched raw APM 2" profile integrated mag	phot.mag
PMAG	mag	Unmatched raw APM profile integrated mag	phot.mag
RMAG	mag	Unmatched APM 'total' mag	phot.mag
BJG	mag	Final bj magnitude without extinction correction	phot.mag;em.opt.B
DY	None	Distortion corrected difference (y_bj - y_R)*100	arith.diff
DX	None	Distortion corrected difference (x_bj - x_R)*100	arith.diff
Y_BJ	None	Plate y_bj in 8 micron pixels	instr.scale
X_BJ	None	Plate x_bj in 8 micron pixels	instr.scale
AREA	pixels	Isophotal area in pixels	phys.area
ECCENT	None	Eccentricity (e): e200 = 200(((sxx-syy)2 + 4sxy2)**0.5)/(sxx + syy)	src.morph.param
ORIENT	deg	Orientation measured in degrees clockwise from E to W: orient = 180/pi * atan(2sxy/((sxx + syy)(1 + e)-syy))	pos.posAng
JON	None	Eyeball classification, value > 0 only for galaxies brighter than about 18th mag: 0 = noise, 1 = S0, 2 = elliptical, 3 = spiral, 4 = irregular, 5 = undetermined galaxy, 6 = star, 7 = star + star merger, 8 = galaxy + star merger, 9 = galaxy + galaxy merger	src.class
IGAL	None	Final classification: -4 = noise, -3 = star + star, -2 = star + fuzz, -1 = star, 0 = galaxy + star merger, 1 = galaxy, 2 = galaxy + galaxy merger	src.class.starGalaxy
PARMU	None	mu classification parameter = mu / mu_star	src.morph.param
PARK	None	k classification parameter = k / k_star	src.morph.param
PROB	None	psi classification parameter: for eyeballed galaxies, psi1000 = (10000 + abs(jon) + psi100); for eyeballed non-galaxies, psi1000 = -(10000 + abs(jon) + psi100)	src.morph.param
BJSEL	mag	Final bj magnitude with extinction correction (i.e. with corrections for isophote, field-effects and plate-matching, then calibrated to total mags with saturation correction, and then extinction corrected)	phot.mag;em.opt.B
dec	dd mm ss.ss	Dec. (B1950) in DD MM SS.S	pos.eq.dec
ra	hh mm ss.ss	R.A. (B1950) in HH MM SS.SS	pos.eq.ra
SEQNUM	None	Assigned sequence number to this object; determines the filename (SEQNUM.fits)	meta.id

spec_sum

name: spec_sum | type: CatalogueTable | Matthew Colless [javascript protected email address] | version 1 |

Summary of spectroscopic information

Address this table as 2dfgrs_fdr.spec_sum

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
obsrun	None	Observation run of best spectrum	obs.param;obs
quality	None	Redshift quality parameter (quality=1-5; reliable redshifts have quality>=3)	meta.code.qual;src.redshift
z_helio	None	Best redshift (heliocentric)	src.redshift;pos.heliocentric
z	None	Best redshift (observed)	src.redshift
best	None	FITS extension number of the best spectrum	meta.code
SR_R	mag	Supercosmos R magnitude without extinction correction	phot.mag;em.opt.R
SB_BJ	mag	Supercosmos bj magnitude without extinction correction	phot.mag;em.opt.B
GALEXT	mag	Galactic extinction value	phys.absorption
BJSELOLD	mag	Original bj magnitude with extinction correction	phot.mag;em.opt.B
BJG_OLD	mag	Original bj magnitude without extinction correction	phot.mag;em.opt.B
BJSEL	mag	Final bj magnitude with extinction correction	phot.mag;em.opt.B
BJG	mag	Final bj magnitude without extinction correction	phot.mag;em.opt.B
dec2000	dd mm ss.ss	Dec. (J2000)	pos.eq.dec;meta.main
ra2000	hh mm ss.ss	R.A. (J2000)	pos.eq.ra;meta.main
dec	dd mm ss.ss	Dec. (B1950)	pos.eq.dec
ra	hh mm ss.ss	R.A. (B1950)	pos.eq.ra
UKST	None	UKST plate (=IFIELD)	obs.field
name	None	2dFGRS name (=NAME)	meta.id;meta.main
spectra	None	Number of spectra	meta.number
serial	None	Database serial number (=SEQNUM)	meta.id

spec_key

name: spec_key | type: CatalogueTable | Matthew Colless [javascript protected email address] | version 1 |

Key spectroscopic information for each observation

Address this table as 2dfgrs_fdr.spec_key

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
ETA_TYPE	None	Eta spectral type parameter (-99.9 if none)	stat.fit.param
SNR	None	Median S/N per pixel	stat.snr;stat.median
NMBEST	None	Number of emission lines for Z_EMI	meta.number
Z_EMI	None	Emission redshift	src.redshift;pos.heliocentric
R_CRCOR	None	Cross-correlation R value	stat.fit.param
KBESTR	None	Cross-correlation template	stat.fit.param
Z_ABS	None	Cross-correlation redshift	stat.fit.param
ABEMMA	None	Redshift type (abs=1, emi=2, man=3)	meta.code;src.redshift
QUALITY	None	Redshift quality parameter	meta.code.qual;src.redshift
Z_HELIO	None	Redshift (heliocentric)	src.redshift;pos.heliocentric
Z	None	Redshift (observed)	src.redshift
OBSRUN	None	Observation run	obs.param;obs
UTDATE	YYYY:MM:DD	UT date of observation	time.epoch;obs
name	None	2dFGRS name (=NAME)	meta.id;meta.main
serial	None	Database serial number (=SEQNUM)	meta.id

spec_best

name: spec_best | type: CatalogueTable | Matthew Colless [javascript protected email address] | version 1 |

The best spectrum of each surveyed galaxy

Address this table as 2dfgrs_fdr.spec_best

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
ETA_TYPE	None	Eta spectral type parameter from best spectrum (-99.9 if none)	stat.fit.param
SNR	None	Median S/N per pixel from best spectrum	stat.snr;stat.median
NMBEST	None	Number of emission lines for Z_EMI from best spectrum	meta.number
Z_EMI	None	Emission redshift from best spectrum	src.redshift;pos.heliocentric
R_CRCOR	None	Cross-correlation R value from best spectrum	stat.fit.param
KBESTR	None	Cross-correlation template from best spectrum	stat.fit.param
Z_ABS	None	Cross-correlation redshift from best spectrum	stat.fit.param
abemma	None	Redshift type (abs=1, emi=2, man=3)	meta.code;src.redshift
quality	None	Redshift quality parameter for best spectrum (quality=1-5; reliable redshifts have quality>=3)	meta.code.qual;src.redshift
obsrun	None	Observation run of best spectrum	obs.param;obs
z_helio	None	Best redshift (heliocentric)	src.redshift;pos.heliocentric
z	None	Best redshift (observed)	src.redshift
SR_R	mag	SuperCosmos R magnitude without extinction correction	phot.mag;em.opt.R
SB_BJ	mag	SuperCosmos bj magnitude without extinction correction	phot.mag;em.opt.B
GALEXT	mag	Galactic extinction value	phys.absorption
BJSELOLD	mag	Original bj magnitude with extinction correction	phot.mag;em.opt.B
BJG_OLD	mag	Original bj magnitude without extinction correction	phot.mag;em.opt.B
BJSEL	mag	Final bj magnitude with extinction correction	phot.mag;em.opt.B
BJG	mag	Final bj magnitude without extinction correction	phot.mag;em.opt.B
dec2000	dd mm ss.ss	Dec. (J2000)	pos.eq.dec;meta.main
ra2000	hh mm ss.ss	R.A. (J2000)	pos.eq.ra;meta.main
dec	dd mm ss.ss	Dec. (B1950)	pos.eq.dec
ra	hh mm ss.ss	R.A. (B1950)	pos.eq.ra
UKST	None	UKST plate (=IFIELD)	obs.field
name	None	2dFGRS name (=NAME)	meta.id;meta.main
spectra	None	Number of spectra obtained	meta.number
serial	None	Database serial number (=SEQNUM)	meta.id

Data Central Generated

name: dc_generated | type: CatalogueGroup | Data Central [javascript protected email address] | version 1 |

Additional tables created by Data Central

Tables
dc_source_list

dc_source_list

name: dc_source_list | type: CatalogueTable | Data Central [javascript protected email address] | version 1 |

Source list of all objects contained within 6dFGS

Address this table as 2dfgrs_fdr.dc_source_list

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
dec			pos.eq.dec
ra			pos.eq.ra
source_name	None	unique ID used for identifying sources	meta.id;meta.main

Facilities/surveys
AAT

AAT

name: AAT | type: SpectraFacility |

All 2dFGRS spectra taken with the AAT.

Data Products
1D Spectrum

1D Spectrum

name: spectrum_1d | type: SpectrumDataProduct | version v1.0 |

Reduced 1D spectrum

6dFGS

The 6dF Galaxy Survey (6dFGS) measured the redshifts of around 150 000 galaxies, and the peculiar velocities of a 15 000-member subsample, over almost the entire southern sky. The targets are all galaxies brighter than K_tot = 12.75 in the 2MASS Extended Source Catalog (XSC), supplemented by 2MASS and SuperCOSMOS galaxies that complete the sample to limits of (H, J, r_F, b_J) = (13.05, 13.75, 15.6, 16.75). Central to the survey is the Six-Degree Field (6dF) multifibre spectrograph, an instrument able to record 150 simultaneous spectra over the 5.7 degree field of the UK Schmidt Telescope. Spectra are obtained in two observations using separate V and R gratings, that together give R ~ 1000 over at least 400-750 nm and signal-to-noise ratio ~10 per pixel. Redshift measurements are obtained semi-automatically, and are assigned a quality value based on visual inspection.

Data Release
Final Data Release

Final Data Release

Data
Catalogues
Spectra

Groups
main
Input Catalogues
supplementary
Data Central Generated

main

name: main | type: CatalogueGroup | Heath Jones [javascript protected email address] | version 1 |

The 6dF Galaxy Survey Catalogue

Tables
TARGET
SPECTRA

TARGET

name: TARGET | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

The master target list

Address this table as 6dfgs_fdr.TARGET

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
FRAMENAME	None	name of SDF frame	meta.id
TEMPLATECODE	None	code for x-correlation template	meta.id
RMAGSEL	mag	Rf magnitude from online SuperCOSMOS Sky Surveys (99.99 and 22.0 are nulls), appeared as RMAG in the EDR and DR1	phot.mag;em.opt.R
BMAGSEL	mag	Bj magnitude from online SuperCOSMOS Sky Surveys (99.99 and 23.0 are nulls), appeared as BMAG in the EDR and DR1	phot.mag;em.opt.B
ZCATREF	None	ZCAT reference	meta.id
ZCATERR	km/s	error on velocity in ZCAT	phys.veloc;stat.error
ZCATVEL	km/s	velocity in ZCAT	phys.veloc
SG	None	SSS star/galaxy flag 1=galaxy 2=star 3=unclass 4=noise	meta.id
RMAG	mag	Rf galaxy magnitude from recalibrated SuperCOSMOS data (0.00 is null)	phot.mag;em.opt.R
BMAG	mag	Bj galaxy magnitude from recalibrated SuperCOSMOS data (0.00 is null)	phot.mag;em.opt.B
PROGID	None	highest priority programme ID	meta.id
A_V	mag	Schlegel V extinction	em.opt.V;phys.absorption.gal
GB	degrees	galactic latitude	pos.galactic.lat
GL	degrees	galactic longitude	pos.galactic.lon
CZ	None	Cartesian z of unit (RA,Dec) vector on celestial sphere	meta.cryptic
CY	None	Cartesian y of unit (RA,Dec) vector on celestial sphere	meta.cryptic
CX	None	Cartesian x of unit (RA,Dec) vector on celestial sphere	meta.cryptic
DEC	degrees	master Dec J2000 (decimal degrees)	pos.eq.dec
RA	degrees	master RA J2000 (decimal degrees)	pos.eq.ra
HTMID	None	Hierarchical Triangular Mesh (20-deep) number, mainly useful internally for indexing on position	pos.HTM
TARGETNAME	None	name in config file, used to name FITS file and generate thumbnail images	meta.id
TARGETID	None	unique ID no., used to link tables	meta.id;meta.main

SPECTRA

name: SPECTRA | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Redshifts and observational data

Address this table as 6dfgs_fdr.SPECTRA

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
AXISEND_V	angstroms	end wavelength of the V-frame	em.wl;instr.setup
AXISSTART_V	angstroms	starting wavelength of the V-frame	em.wl;instr.setup
FRAMENAME	None	name of the observed field frame	meta.id
PID_R	None	PID number read from R frame	meta.cryptic
RECMAG_R	mag	magnitude read from R frame	phot.mag
PIVOT_R	None	R pivot number	instr.setup
FIBRE_R	TODO	fibre number (row on CCD)	meta.id
THETA_R	TODO	fibre angle R frame	instr.offset
YERR_R	TODO	error on Y_R position	stat.error;pos.cartesian.y
XERR_R	TODO	error on X_R position	stat.error;pos.cartesian.x
Y_R	TODO	y position of object from R frame	pos.cartesian.y
X_R	TODO	x position of object from R frame	pos.cartesian.x
DEC_R	degrees	observed Dec (J2000 degrees)	pos.eq.dec
RA_R	degrees	observed RA (J2000 degrees)	pos.eq.ra
THPUT_R	None	R throughput of fibre	instr.sensitivity
NAME_R	None	name of object in R frame	meta.id
MJDOBS_R	None	MJD of observation	time.epoch;obs
UTSTRT_R	None	UT start time of R reference frame	time.start
UTDATE_R	None	UT date in R frame, default 1900-01-01	time.epoch;obs
CCD_R	None	R CCD name	meta.id
NOISE_R	TODO	R readout noise	instr.det.noise
GAIN_R	TODO	R gain	instr.setup
FOCUS_R	TODO	R frame spectrograph focus value	instr.setup
SOURCE_R	None	R source plate	meta.id
GRATBLAZ_R	None	R blaze direction	instr.setup
GRATSLOT_R	None	R grating slot ID	meta.id
GRATSET_R	TODO	R grating micrometer setting	instr.setup
GRATID_R	None	grating ID in R frame	meta.id
NCOMB_R	None	number of R frames combined	meta.number
EXP_R	seconds	R reference frame exposure time seconds	time.duration
RUN_R	None	R run number	meta.id
OBSID_R	None	obsid in R frame	meta.id
LABEL_R	None	label in R frame	meta.id
PROGID_R	None	programme ID in R frame	meta.id
CONMJD_R	None	time which was specified when configure was run	time.epoch;instr.setup
ACTMJD_R	None	the time the field was actually configured	time.epoch;instr.setup
APPDEC_R	degrees	apparent DEC of field centre	pos.eq.dec
APPRA_R	degrees	apparent RA of field centre	pos.eq.ra
CENDEC_R	degrees	DEC of field centre	pos.eq.dec
CENRA_R	degrees	RA of field centre	pos.eq.ra
TITLE_R	None	eg 1325m243p2.sds observation title	meta.id
PID_V	None	PID number read from V frame	meta.cryptic
RECMAG_V	mag	magnitude read from V frame	phot.mag
PIVOT_V	None	V pivot number	instr.setup
FIBRE_V	None	fibre number (row on CCD)	meta.id
THETA_V	degrees	fibre angle V frame	instr.offset
YERR_V	TODO	error on Y_V position	stat.error;pos.cartesian.y
XERR_V	TODO	error on X_V position	stat.error;pos.cartesian.x
Y_V	TODO	y position of object from V frame	pos.cartesian.y
X_V	TODO	x position of object from V frame	pos.cartesian.x
DEC_V	degrees	observed Dec (J2000 degrees)	pos.eq.dec
RA_V	degrees	observed RA (J2000 degrees)	pos.eq.ra
THPUT_V	None	V throughput of fibre	instr.sensitivity
NAME_V	None	name of object in V frame	meta.id
MJDOBS_V	None	MJD of observation	time.epoch;obs
UTSTRT_V	None	UT start time of V reference frame	time.start
UTDATE_V	None	UT date in V frame, default 1900-01-01	time.epoch;obs
CCD_V	None	V CCD name	meta.id
NOISE_v	TODO	V readout noise	instr.det.noise
GAIN_V	TODO	V gain	instr.setup
TFOCUS_V	TODO	V frame telescope focus value	instr.setup
FOCUS_V	TODO	V frame spectrograph focus value	instr.setup
SOURCE_V	None	V source plate	meta.id
GRATBLAZ_V	None	V blaze direction	instr.setup
GRATSLOT_V	None	V grating slot ID	meta.id
GRATSET_V	TODO	V grating micrometer setting	instr.setup
GRATID_V	None	grating ID in V frame	meta.id
Z_COMM_INITIAL	None	redshifter's comment prior to revision	meta.note
PROGID	None	highest priority programme ID of observed object	meta.id
REVCOMMENT	None	comment/origin of redshift revision	meta.note
REVTEMPLATE	None	code of template used in redshift revision	meta.code
DEPRECATED	None	flag used to expunge rows prior to release	meta.code
QUALITY_UPDATE_COMM	None	comment on quality change	meta.note
XTALKCOMM	None	comment on crosstalk	meta.note
XTALKVELOFF	km/s	velocity offset between contaminated and contaminator objects	spect.dopplerVeloc;arith.diff
XTALKSCORE	None	0 (uncontaminated) to 5 (likely cross-talk)	meta.code.qual
XTALKFLAG	None	-1 if object is a contaminator, 0 (default) objects is neither contaminator or contaminated, +N object contaminated by fibre N. Details on cross-talk contamination	meta.code.class
QUALITY_INITIAL	None	QUALITY value at initial ingest	meta.code.qual
SLIT_VANE_CORR	km/s	slit vane redshift correction in km/s	arith.factor;src.redshift
Z_UPDATE_COMM	None	not currently used	meta.note
Z_UPDATE_FLAG	None	0 - uncorrected, 1 - slit vane corrected, 2 - template corrected, 3 - template and slit vane corrected	meta.code
Z_HELIO_INITIAL	None	value of attribute Z_HELIO at initial ingest i.e. before further corrections	src.redshift
Z_INITIAL	None	value of attribute Z at initial ingest i.e. before corrections	src.redshift
MATCHSPECID	None	SPECID of same object observation already ingested (usually = 0, helps flag frames objects that were re-analysed	meta.id
AXISEND_R	angstroms	end wavelength of the R-frame	em.wl;instr.setup
AXISSTART_R	angstroms	starting wavelength of the R-frame	em.wl;instr.setup
NCOMB_V	None	number of V frames combined	meta.number
EXP_V	seconds	V reference frame exposure time seconds	time.duration
RUN_V	None	V run number	meta.id
OBSID_V	None	obsid in V frame	meta.id
LABEL_V	None	label in V frame	meta.id
PROGID_V	None	programme ID in V frame	meta.id
CONMJD_V	None	time which was specified when configure was run	time.epoch;instr.setup
ACTMJD_V	None	the time the field was actually configured	time.epoch;instr.setup
APPDEC_V	degrees	apparent DEC of field centre	pos.eq.dec
APPRA_V	degrees	apparent RA of field centre	pos.eq.ra
CENDEC_V	degrees	DEC of field centre	pos.eq.dec
CENRA_V	degrees	RA of field centre	pos.eq.ra
TITLE_V	None	eg 1325m243p2.sds observation title	meta.id
ZFINALERR	None	error on final quoted redshift, 0.0 if not measured	stat.error;src.redshift
ZABSBESTERR	None	error on the selected absorption line redshift, 0.0 if not measured	stat.error;src.redshift
ZEMIBESTERR	None	error on the selected emission line redshift, 0.0 if not measured	stat.error;src.redshift
Z_COMM	None	redshifter's comment	meta.note
IALTER	None	IALTER=1 if automatic z altered	meta.code.class
Q_FINAL	None	suggested quality for redshift	meta.code.qual;src.redshift
Q_Z_ABS	None	cross-correlation quality	meta.code.qual
Z_ABS	None	cross-correlation redshift(uncorrected)	src.redshift
R_CRCOR	None	cross-correlation peak	meta.cryptic
KBESTR	None	cross-correlation template	meta.id
Q_Z_EMI	None	emission redshift quality	meta.code.qual;src.redshift
Z_EMI	None	emission redshift (uncorrected)	src.redshift
NGOOD	None	number of good emission lines	spect.line;meta.number
NMBEST	None	emission lines for emission z	spect.line;meta.number
ABEMMA	None	redshift type: abs=1,emi=2,man=3	meta.code.member;src.redshift
QUALITY	None	redshift measurement quality: 4=good 1=bad (6=star)	meta.code.qual;src.redshift
Z_HELIO	None	heliocentric redshift (corrected for heliocentric motion, template offsets and slit vane shift)	src.redshift;pos.heliocentric
Z	None	raw measured redshift,(corrected for template offsets and slit vane shift)	src.redshift
Z_ORIGIN	None	redshift from C=combined V or R frame	src.redshift
CZ	None	Cartesian z of unit vector on celestial sphere	meta.cryptic
CY	None	Cartesian y of unit vector on celestial sphere	meta.cryptic
CX	None	Cartesian x of unit vector on celestial sphere	meta.cryptic
HTMID	None	Hierarchical Triangular Mesh (20-deep), mainly useful internally for indexing on position	meta.id
MATCH_DR	arcsec	position match error (arcsec)	stat.error;pos
OBSDEC	degrees	observed Dec (J2000 degrees)	pos.eq.dec
OBSRA	degrees	observed RA (J2000 degrees)	pos.eq.ra
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
TARGETID	None	ID no. in Target table	meta.id.cross
SPECID	None	unique ID no., used to generate GIF image of spectrum	meta.id

Input Catalogues

name: input_catalogues | type: CatalogueGroup | Heath Jones [javascript protected email address] | version 1 |

The various input catalogues used to create the target list

Tables
FSC
RASS
HIPASS
DURUKST
SHAPLEY
DENISI
DENISJ
AGN2MASS
HES
NVSS
SUMSS
TWOMASS
SUPERCOS

FSC

name: FSC | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Sources from the IRAS FAINT Source Catalogue

Address this table as 6dfgs_fdr.FSC

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
COMMENT	None	supplied comments	meta.note
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

RASS

name: RASS | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Candidate AGN from the ROSAT All-Sky Survey

Address this table as 6dfgs_fdr.RASS

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
COMMENT	None	supplied comments	meta.note
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

HIPASS

name: HIPASS | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Sources from the HIPASS HI survey

Address this table as 6dfgs_fdr.HIPASS

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

DURUKST

name: DURUKST | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Extension to Durham/UKST galaxy survey

Address this table as 6dfgs_fdr.DURUKST

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

SHAPLEY

name: SHAPLEY | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Galaxies from the Shapley supercluster

Address this table as 6dfgs_fdr.SHAPLEY

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

DENISI

name: DENISI | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Galaxies from DENIS I < 14.85

Address this table as 6dfgs_fdr.DENISI

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
COMMENT	None	supplied comments	meta.note
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

DENISJ

name: DENISJ | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

galaxies from DENIS J < 13.85

Address this table as 6dfgs_fdr.DENISJ

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
COMMENT	None	supplied comments	meta.note
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

AGN2MASS

name: AGN2MASS | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Candidate AGN from the 2MASS red AGN survey

Address this table as 6dfgs_fdr.AGN2MASS

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
MAG_3	mag	supplied magnitude 3	phot.mag
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

HES

name: HES | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Candidate QSOs from the Hamburg/ESO Survey

Address this table as 6dfgs_fdr.HES

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

NVSS

name: NVSS | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Candidate QSOs from NVSS

Address this table as 6dfgs_fdr.NVSS

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

SUMSS

name: SUMSS | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

Bright radio sources from SUMSS

Address this table as 6dfgs_fdr.SUMSS

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
MAG_2	mag	supplied magnitude 2	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude 1	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

TWOMASS

name: TWOMASS | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

2MASS input catalogue J, H and K

Address this table as 6dfgs_fdr.TWOMASS

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
RTOT	arcsec	radius of the total size of the galaxy	phys.size.radius
KTOT	mag	K total magnitude	phot.mag;em.IR.K
HTOT	mag	H total magnitude	phot.mag;em.IR.H
JTOT	mag	J total magnitude	phot.mag;em.IR.J
KEXT_K	mag	KEXT minus K (corrected)	phot.mag;em.IR.K
K	mag	K magnitude (corrected) used for K selection	phot.mag;em.IR.K
KEXT	mag	KEXT magnitude	phot.mag;em.IR.K
H	mag	H magnitude (HEXT) used for H selection	phot.mag;em.IR.H
J	mag	J magnitude (JEXT) used for J selection	phot.mag;em.IR.J
CORR	mag	correction, based on MUK20FE, made to the isophotal magnitude K_M_K20FE to get a pseudo-total magnitude K	phot.mag;em.IR.K;arith.factor
MUK20FE	mag	average surface brightness within the mu_K = 20mag/sq arcsec elliptical isophote (derived from K_M_K20FE, RADIUS and A_B)	phot.mag.sb;stat.mean
A_B	arcsec	minor/major axis ratio fit to 3-sigma super-coadd isophote	phys.size.axisRatio;meta.modelled
RADIUS	arcsec	20mag/sq." isophotal K fiducial elliptical aperture semi-major axis	phys.angSize.smajAxis
K_M_K20FE	mag	K 20mag/sq." isophotal fiducial elliptical aperture magnitude	phot.mag;em.IR.K
H_M_K20FE	mag	H 20mag/sq." isophotal fiducial elliptical aperture magnitude	phot.mag;em.IR.H
J_M_K20FE	mag	J 20mag/sq." isophotal fiducial elliptical aperture magnitude	phot.mag;em.IR.J
MAG_2	mag	supplied magnitude	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	supplied magnitude	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
prevCATNAME	None	original catalogue name	meta.id
CATNAME	None	2MASS catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.main

SUPERCOS

name: SUPERCOS | type: CatalogueTable | Heath Jones [javascript protected email address] | version 1 |

SuperCOSMOS bright galaxies Bj and R

Address this table as 6dfgs_fdr.SUPERCOS

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
COMMENT	None	SuperCOSMOS reference (field no. + B_index + R_index)	meta.note
MAG_2	mag	R magnitude, SuperCOSMOS magnitudes generated from a revised calibration, done at the time of input catalogue preparation, tuned to the magnitude range of interest.	phot.mag
PROGID	None	programme ID	meta.id
MAG_1	mag	Bj magnitude, SuperCOSMOS magnitudes generated from a revised calibration, done at the time of input catalogue preparation, tuned to the magnitude range of interest.	phot.mag
PRIORITY	None	survey weight	meta.code.class
DEC	degrees	Dec J2000	pos.eq.dec
RA	degrees	RA J2000	pos.eq.ra
TARGETID	None	matching ID number in target	meta.id.cross
TARGETNAME	None	matching name in target table, used to name FITS files and generate thumbnail images	meta.id
CATNAME	None	supplied catalogue name	meta.id
OBJID	None	unique ID number	meta.id;meta.mainmeta.id;meta.main

supplementary

name: supplementary | type: CatalogueGroup | Heath Jones [javascript protected email address] | version 1 |

Additional tables produced as part of 6dfgs

Tables

Data Central Generated

name: dc_generated | type: CatalogueGroup | Data Central [javascript protected email address] | version 1 |

Additional tables created by Data Central

Tables
dc_source_list

dc_source_list

name: dc_source_list | type: CatalogueTable | Data Central [javascript protected email address] | version 1 |

Source list of all objects contained within 6dFGS

Address this table as 6dfgs_fdr.dc_source_list

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
dec	degrees	master Dec J2000 (decimal degrees)	pos.eq.dec
ra	degrees	master RA J2000 (decimal degrees)	pos.eq.ra
source_name	None	unique ID used for identifying sources	meta.id;meta.main

Facilities/surveys
AAT

AAT

name: AAT | type: SpectraFacility |

All 6dFGS spectra obtained at the AAT.

Data Products
1D Spectrum
1D Spectrum

1D Spectrum

name: spectrum_1d | type: SpectrumDataProduct | Heath Jones [javascript protected email address] | version 1.0 |

Reduced 1D spectrum

1D Spectrum

name: spectrum_1d_table | type: SpectrumDataProduct | Heath Jones [javascript protected email address] | version 1.0 |

Reduced 1D spectrum

GAMA

GAMA is a project to exploit the latest generation of ground-based and space-borne survey facilities to study cosmology and galaxy formation and evolution.

At the heart of this project lies the GAMA spectroscopic survey of ~300,000 galaxies down to r < 19.8 mag over ~286 deg², carried out using the AAOmega multi-object spectrograph on the Anglo-Australian Telescope (AAT) by the GAMA team. This project was awarded 210 nights over 7 years (2008–2014) and the observations are now completed. This survey builds on, and is augmented by, previous spectroscopic surveys such as the Sloan Digital Sky Survey (SDSS), the 2dF Galaxy Redshift Survey(2dFGRS) and the Millennium Galaxy Catalogue (MGC).

Data Release
Data Release 2
Panchromatic Data Release

Data Release 2

Data
Catalogues
Spectra

Groups
ApMatchedPhotom
EnvironmentMeasures
ExternalSpec
GalexPhotometry
GroupFinding
InputCat
LocalFlowCorrection
SersicPhotometry
SpecCat
SpecLineSFR
StellarMasses
kCorrections

ApMatchedPhotom

name: ApMatchedPhotom | type: CatalogueGroup | Mehmet Alpaslan [javascript protected email address] | version v02 |

This DMU provides aperture matched ugrizYJHK photometry.

Tables
ApMatchedCat

ApMatchedCat

name: ApMatchedCat | type: CatalogueTable | Mehmet Alpaslan [javascript protected email address] | version v02 |

ApMatchedPhotom
ApMatchedCat
v02
2012-04-23
Mehmet Alpaslan

This catalogue provides Kron and Petrosian photometry for all GAMA DR2
objects, as well as other Source Extractor outputs for the ugrizYJHK
bands obtained from the v02 mosaics using Source Extractor.

The GAMA mosaics have been constructed by stitching together
individual frames of images taken from the SDSS and UKIDSS LAS surveys
using SWarp, a resampling and co-adding program. There is one mosaic
per band and per GAMA survey region. All frames in the mosaics have
been pre-convolved to a common seeing of 2 arcsec and renormalised.
The pixel scale of these mosaics (and hence of the present catalogue)
is 0.339 arcsec per pixel. The zero-point used throughout is 30 mag.
The mosaics are available on the DR2 file server (swpci* files).

The photometry was obtained by using Source Extractor in matched
aperture mode. In short, this mode allows Source Extractor to fit an
aperture around a possible source in one image, and measure the flux
from another. In the present case, we have fit the apertures to r-band
images and measure the fluxes in all 9 bands. This process was
automated using a wrapper written in R that creates a cutout image of
each source in all 9 bands, each of which is fed into Source Extractor
alongside the master r-band cutout. Where Source Extractor fails to
calculate a magnitude (for whatever reason) the default value returned
is 99. Any nonsense results (negative values for FLUX, BACKGROUND or
FWHM) are caused by Source Extractor failing; in these cases consult
the appropriate FLAGS column to get some indication as to why this is
happening.

Some small areas of the GAMA survey regions are not covered by the
YJHK mosaics because some frames in these bands had to be removed due
to poor image quality. The YJHK magnitudes and errors of objects
located in these areas have been set to -99, while their fluxes and
associated errors have been set to 0 and 1E99, respectively.

#######################################################################

MAG_AUTO_ / MAG_PETRO_

The magnitudes presented in this catalogue have not been corrected for
the effect of foreground Milky Way dust extinction. Should these
corrections be required, they can be obtained from the table
GalacticExtinction in the InputCat DMU.

All photomotry is on the AB system.

#######################################################################

Photometric errors

The errors associated with the MAG_AUTO and MAG_PETRO values have been
calculated and rescaled in such a way as to match the errors used in
the SDSS and UKIDSS photometry catalogues. To do this, the raw Source
Extractor errors have been taken and, for each band, rescaled such
that they match these existing photometry catalogues as accurately as
possible. The original Source Extractor errors are preserved in the
_SE columns.

########################################################################

Potential zero-point offsets

From recent comparisons with VIKING and 2MASS we have discovered an
apparent zero-point offset in our photometry derived from the UKIDSS
LAS data. The cause of this offset is still not fully understood.
This issue will be described in more detail in a future paper
presenting the GAMA II panchromatic photometry catalogue (Driver et
al., in prep.). In the meantime, users may wish to consider applying
the following zero-point offsets to bring the YJHK magnitudes of this
catalogue into agreement with VIKING:

Y_corr = Y_DR2 - 0.13 mag
J_corr = J_DR2 - 0.12 mag
H_corr = H_DR2 - 0.07 mag
K_corr = K_DR2 - 0.11 mag

########################################################################

Dependencies:

InputCat TilingCatv16
Mosaicing v02

#######################################################################

The Source Extractor parameters used to generate this catalogue are as
follows:

DETECT_MINAREA 16
Minimum number of pixels above threshold triggering detection.

DETECT_THRESH 1.7
Detection threshold relative to background.

FILTER N
If true, filtering is applied to the data before extraction.

DEBLEND_NTHRESH 32
Number of deblending sub-thresholds.

DEBLEND_MINCONT 0.00005
Minimum contrast parameter for deblending.

CLEAN_PARAM 0.1
Efficiency of cleaning.

WEIGHT_TYPE NONE
Weighting scheme used for weight maps. In this case, these are not used.

PHOT_FLUXFRAC 0.5
Fraction of flux used to determine each element of the flux radius vector.

SATUR_LEVEL 500000
Pixel value above which the pixel is considered saturated.

MAG_ZEROPOINT 30
Zero-point offset applied to magnitudes.

PIXEL_SCALE 0.339
Pixel scale in arcsec.

For a detailed explanation of what each of these parameters does,
please see this third party guide to Source Extractor.

This table contains r-band aperture matched photometry and other Source Extractor outputs for all GAMA DR2 objects.

Address this table as gama_dr2.ApMatchedCat

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
Y	pixel	y coordinate of aperture centre in r band cutout	pos
X	pixel	x coordinate of aperture centre in r band cutout	pos
THRESHOLD	counts	Detection threshold above background (r band)	instr.sensitivity;phot.count;em.opt.R
THETA_J2000	deg	Position angle (east of north)	pos.posAng;em.opt.R
THETA_IMAGE	deg	Position angle (counterclockwise)	pos.posAng;em.opt.R
RA	deg	J2000 coordinate	pos.eq.ra
PETRO_RADIUS	pixel	Petrosian radius (r band)	phys.size.radius;em.opt.R
OBJID	-	SDSS objid	meta.id
MU_THRESHOLD	mag/arcsec^2	Detection threshold above background (r band)	instr.sensitivity;phot.mag.sb;em.opt.R
MU_MAX_Z	mag/arcsec^2	Peak surface brightness (z band)	phot.mag.sb;statm.ax;em.opt.Z
MU_MAX_Y	mag/arcsec^2	Peak surface brightness (Y band)	phot.mag.sb;stat.max;em.IR.Y
MU_MAX_U	mag/arcsec^2	Peak surface brightness (u band)	phot.mag.sb;stat.max;em.opt.U
MU_MAX_R	mag/arcsec^2	Peak surface brightness (r band)	phot.mag.sb;stat.max;em.opt.R
MU_MAX_K	mag/arcsec^2	Peak surface brightness (K band)	phot.mag.sb;stat.max;em.IR.K
MU_MAX_J	mag/arcsec^2	Peak surface brightness (J band)	phot.mag.sb;stat.max;em.IR.J
MU_MAX_I	mag/arcsec^2	Peak surface brightness (i band)	phot.mag.sb;stat.max;em.opt.I
MU_MAX_H	mag/arcsec^2	Peak surface brightness (H band)	phot.mag.sb;stat.max;em.IR.H
MU_MAX_G	mag/arcsec^2	Peak surface brightness (g band)	phot.mag.sb;stat.max;em.opt.G
MAG_PETRO_Z	mag	Petrosian magnitude (z band)	phot.mag;em.opt.Z
MAG_PETRO_Y	mag	Petrosian magnitude (Y band)	phot.mag;em.IR.Y
MAG_PETRO_U	mag	Petrosian magnitude (u band)	phot.mag;em.opt.U
MAG_PETRO_R	mag	Petrosian magnitude (r band)	phot.mag;em.opt.R
MAG_PETRO_K	mag	Petrosian magnitude (K band)	phot.mag;em.IR.K
MAG_PETRO_J	mag	Petrosian magnitude (J band)	phot.mag;em.IR.J
MAG_PETRO_I	mag	Petrosian magnitude (i band)	phot.mag;em.opt.I
MAG_PETRO_H	mag	Petrosian magnitude (H band)	phot.mag;em.IR.H
MAG_PETRO_G	mag	Petrosian magnitude (g band)	phot.mag;em.opt.G
MAG_AUTO_Z	mag	Kron magnitude (z band)	phot.mag.em.opt.Z
MAG_AUTO_Y	mag	Kron magnitude (Y band)	phot.mag;em.IR.Y
MAG_AUTO_U	mag	Kron magnitude (u band)	phot.mag;em.opt.U
MAG_AUTO_R	mag	Kron magnitude (r band)	phot.mag;em.opt.R
MAG_AUTO_K	mag	Kron magintude (K band)	phot.mag;em.IR.K
MAG_AUTO_J	mag	Kron magnitude (J band)	phot.mag;em.IR.J
MAG_AUTO_I	mag	Kron magntiude (i band)	phot.mag;em.opt.I
MAG_AUTO_H	mag	Kron magnitude (H band)	phot.mag;em.IR.H
MAG_AUTO_G	mag	Kron magnitude (g band)	phot.mag;em.opt.G
MAGERR_PETRO_Z	mag	Petrosian magnitude error (z band)	stat.error;phot.mag;em.opt.Z
MAGERR_PETRO_Y	mag	Petrosian magnitude error (Y band)	stat.error;phot.mag;em.IR.Y
MAGERR_PETRO_U	mag	Petrosian magnitude error (u band)	stat.error;phot.mag;em.opt.U
MAGERR_PETRO_R	mag	Petrosian magnitude (r band)	stat.error;phot.mag;em.opt.R
MAGERR_PETRO_K	mag	Petrosian magnitude error (K band)	stat.error;phot.mag;em.IR.K
MAGERR_PETRO_J	mag	Petrosian magnitude error (J band)	stat.error;phot.mag;em.IR.J
MAGERR_PETRO_I	mag	Petrosian magnitude error (i band)	stat.error;phot.mag;em.opt.I
MAGERR_PETRO_H	mag	Petrosian magnitude error (H band)	stat.error;phot.mag;em.IR.H
MAGERR_PETRO_G	mag	Petrosian magnitude (g band)	stat.error;phot.mag;em.opt.G
MAGERR_AUTO_Z	mag	Kron magnitude error (z band)	stat.error;phot.mag;em.opt.Z
MAGERR_AUTO_Y	mag	Kron magnitude error (Y band)	stat.error;phot.mag;em.IR.Y
MAGERR_AUTO_U	mag	Kron magnitude error (u band)	stat.error;phot.mag;em.opt.U
MAGERR_AUTO_R	mag	Kron magnitude (r band)	stat.error;phot.mag;em.opt.R
MAGERR_AUTO_K	mag	Kron magnitude error (K band)	stat.error;phot.mag;em.IR.K
MAGERR_AUTO_J	mag	Kron magnitude error (J band)	stat.error;phot.mag;em.IR.J
MAGERR_AUTO_I	mag	Kron magnitude error (i band)	stat.error;phot.mag;em.opt.I
MAGERR_AUTO_H	mag	Kron magnitude error (H band)	stat.error;phot.mag;em.IR.H
MAGERR_AUTO_G	mag	Kron magnitude error (g band)	stat.error;phot.mag;em.opt.G
KRON_RADIUS	pixel	Kron radius (r band)	phys.size.radius;em.opt.R
ISOAREA_IMAGE_Z	pixel	Isophotal area (z band)	phys.angArea;em.opt.Z
ISOAREA_IMAGE_Y	pixel	Isophotal area (Y band)	phys.angArea;em.IR.Y
ISOAREA_IMAGE_U	pixel	Isophotal area (u band)	phys.angArea;em.opt.U
ISOAREA_IMAGE_R	pixel	Isophotal area (r band)	phys.angArea;em.opt.R
ISOAREA_IMAGE_K	pixel	Isophotal area (K band)	phys.angArea;em.IR.K
ISOAREA_IMAGE_J	pixel	Isophotal area (J band)	phys.angArea;em.IR.J
ISOAREA_IMAGE_I	pixel	Isophotal area (i band)	phys.angArea;em.opt.I
ISOAREA_IMAGE_H	pixel	Isophotal area (H band)	phys.angArea;em.IR.H
ISOAREA_IMAGE_G	pixel	Isophotal area (g band)	phys.angArea;em.opt.G
ISOAREAF_IMAGE	pixel	Isophotal area (filtered) (r band)	phys.angArea;em.opt.R
FWHM_IMAGE_Z	pixel	FWHM assuming a Gaussian core (z band)	spect.line.width;obs.image;em.opt.Z
FWHM_IMAGE_Y	pixel	FWHM assuming a Gaussian core (Y band)	spect.line.width;obs.image;em.IR.Y
FWHM_IMAGE_U	pixel	FWHM assuming a Gaussian core (u band)	spect.line.width;obs.image;em.opt.U
FWHM_IMAGE_R	pixel	FWHM assuming a Gaussian core (r band)	spect.line.width;obs.image;em.opt.R
FWHM_IMAGE_K	pixel	FWHM assuming a Gaussian core (K band)	spect.line.width;obs.image;em.IR.K
FWHM_IMAGE_J	pixel	FWHM assuming a Gaussian core (J band)	spect.line.width;obs.image;em.IR.J
FWHM_IMAGE_I	pixel	FWHM assuming a Gaussian core (i band)	spect.line.width;obs.image;em.opt.I
FWHM_IMAGE_H	pixel	FWHM assuming a Gaussian core (H band)	spect.line.width;obs.image;em.IR.H
FWHM_IMAGE_G	pixel	FWHM assuming a Gaussian core (g band)	spect.line.width;obs.image;em.opt.G
FLUX_PETRO_Z	counts	Petrosian flux (z band)	phot.flux;em.opt.Z
FLUX_PETRO_Y	counts	Petrosian flux (Y band)	phot.flux;em.IR.Y
FLUX_PETRO_U	counts	Petrosian flux (u band)	phot.flux;em.opt.U
FLUX_PETRO_R	counts	Petrosian flux (r band)	phot.flux;em.opt.R
FLUX_PETRO_K	counts	Petrosian flux (K band)	phot.flux;em.IR.K
FLUX_PETRO_J	count	Petrosian flux (J band)	phot.flux;em.IR.J
FLUX_PETRO_I	counts	Petrosian flux (i band)	phot.flux;em.opt.I
FLUX_PETRO_H	counts	Petrosian flux (H band)	phot.flux;em.IR.H
FLUX_PETRO_G	counts	Petrosian flux (g band)	phot.flux;em.opt.G
FLUX_MAX_Z	count	Peak flux (z band)	phot.flux;stat.max;em.opt.Z
FLUX_MAX_Y	counts	Peak flux (Y band)	phot.flux;stat.max;em.IR.Y
FLUX_MAX_U	counts	Peak flux (u band)	phot.flux;stat.max;em.opt.U
FLUX_MAX_R	counts	Peak flux (r band)	phot.flux;stat.max;em.opt.R
FLUX_MAX_K	counts	Peak flux (K band)	phot.flux;stat.max;em.IR.K
FLUX_MAX_J	counts	Peak flux (J band)	phot.flux;stat.max;em.IR.J
FLUX_MAX_I	counts	Peak flux (i band)	phot.flux;stat.max;em.opt.I
FLUX_MAX_H	counts	Peak flux (H band)	phot.flux;stat.max;em.IR.H
FLUX_MAX_G	counts	Peak flux (g band)	phot.flux;stat.max;em.opt.G
FLUX_AUTO_Z	counts	Kron flux (z band)	phot.flux;em.opt.Z
FLUX_AUTO_Y	counts	Kron flux (Y band)	phot.flux;em.IR.Y
FLUX_AUTO_U	counts	Kron flux (u band)	phot.flux;em.opt.U
FLUX_AUTO_R	counts	Kron flux (r band)	phot.flux;em.opt.R
FLUX_AUTO_K	counts	Kron flux (K band)	phot.flux;em.IR.K
FLUX_AUTO_J	count	Kron flux (J band)	phot.flux;em.IR.J
FLUX_AUTO_I	counts	Kron flux (i band)	phot.flux;em.opt.I
FLUX_AUTO_H	counts	Kron flux (H band)	phot.flux;em.IR.H
FLUX_AUTO_G	counts	Kron flux (g band)	phot.flux;em.opt.G
FLUXERR_PETRO_Z	counts	Petrosian flux error (z band)	stat.error;phot.flux;em.opt.Z
FLUXERR_PETRO_Y	counts	Petrosian flux error (Y band)	stat.error;phot.flux;em.IR.Y
FLUXERR_PETRO_U	counts	Petrosian flux error (u band)	stat.error;phot.flux;em.opt.U
FLUXERR_PETRO_R	counts	Petrosian flux error (r band)	stat.error;phot.flux;em.opt.R
FLUXERR_PETRO_K	counts	Petrosian flux error (K band)	stat.error;phot.flux;em.IR.K
FLUXERR_PETRO_J	count	Petrosian flux error (J band)	stat.error;phot.flux;em.IR.J
FLUXERR_PETRO_I	counts	Petrosian flux error (i band)	stat.error;phot.flux;em.opt.I
FLUXERR_PETRO_H	counts	Petrosian flux error (H band)	stat.error;phot.flux;em.IR.H
FLUXERR_PETRO_G	counts	Petrosian flux error (g band)	stat.error;phot.flux;em.opt.G
FLUXERR_AUTO_Z	counts	Kron flux error (z band)	stat.error;phot.flux;em.opt.Z
FLUXERR_AUTO_Y	counts	Kron flux error (Y band)	stat.error;phot.flux;em.IR.Y
FLUXERR_AUTO_U	counts	Kron flux error (u band)	stat.error;phot.flux;em.opt.U
FLUXERR_AUTO_R	counts	Kron flux error (r band)	stat.error;phot.flux;em.opt.R
FLUXERR_AUTO_K	counts	Kron flux error (K band)	stat.error;phot.flux;em.IR.K
FLUXERR_AUTO_J	count	Kron flux error (J band)	stat.error;phot.flux;em.IR.J
FLUXERR_AUTO_I	counts	Kron flux error (i band)	stat.error;phot.flux;em.opt.I
FLUXERR_AUTO_H	counts	Kron flux error (H band)	stat.error;phot.flux;em.IR.H
FLUXERR_AUTO_G	counts	Kron flux error (g band)	stat.error;phot.flux;em.opt.G
FLAGS_Z	-	Source Extractor flags (z band)	meta.code.qual;em.opt.Z
FLAGS_Y	-	Source Extractor flags (Y band)	meta.code.qual;em.IR.Y
FLAGS_U	-	Source Extractor flags (u band)	meta.code.qual;em.opt.U
FLAGS_R	-	Source Extractor flags (r band)	meta.code.qual;em.opt.R
FLAGS_K	-	Source Extractor flags (K band)	mag.code.qual;em.IR.K
FLAGS_J	-	Source Extractor flags (J band)	meta.code.qual;em.IR.J
FLAGS_I	-	Source Extractor flags (i band)	meta.code.qual;em.opt.I
FLAGS_H	-	Source Extractor flags (H band)	meta.code.qual;em.IR.H
FLAGS_G	-	Source Extractor flags (g band)	meta.code.qual;em.opt.G
ERRTHETA_J2000	deg	J2000 position angle error (r band)	stat.error;pos.posAng;em.opt.R
ERRB_IMAGE	pixel	Minor axis profile RMS error (r band)	stat.error;phys.angSize;em.opt.R
ERRA_IMAGE	pixel	Major axis profile RMS error (r band)	stat.error;phys.angSize;em.opt.R
DELTA_J2000	deg	DEC (r band)	pos.eq.dec;em.opt.R
DEC	deg	J2000 coordinate	pos.eq.dec
CATAID	-	Unique GAMA object ID	meta.id
B_IMAGE	pixel	Profile RMS along minor axis (r band)	phys.angsSize;em.opt.R
BACKGROUND_Z	counts	Background at centroid (z band)	instr.background;phot.count;em.opt.Z
BACKGROUND_Y	counts	Background at centroid (Y band)	instr.background;phot.count;em.IR.Y
BACKGROUND_U	counts	Background at centroid (u band)	instr.background;phot.count;em.opt.U
BACKGROUND_R	counts	Background at centroid (r band)	instr.background;phot.count;em.opt.R
BACKGROUND_K	counts	Background at centroid (K band)	instr.background;phot.count;em.IR.K
BACKGROUND_J	counts	Background at centroid (J band)	instr.background;phot.count;em.IR.J
BACKGROUND_I	counts	Background at centroid (i band)	instr.background;phot.count;em.opt.I
BACKGROUND_H	counts	Background at centroid (H band)	instr.background;phot.count;em.IR.H
BACKGROUND_G	counts	Background at centroid (g band)	instr.background;phot.count;em.opt.G
A_IMAGE	pixel	Profile RMS along major axis (r band)	phys.angSize;em.opt.R
ALPHA_J2000	deg	RA (r band)	pos.eq.ra;em.opt.R

EnvironmentMeasures

name: EnvironmentMeasures | type: CatalogueGroup | Sarah Brough [javascript protected email address] | version v02 |

EnvironmentMeasures
EnvironmentMeasures
v02
2014-08-21
Sarah Brough

The EnvironmentMeasures DMU provides several different metrics of the
local environment of GAMA DR2 galaxies: a surface density, the number
of galaxies within a cylinder, and the density of galaxies within an
adaptive Gaussian ellipsoid.

Note that this release only covers the GAMA G15 survey region.

All of these environment measurements are performed on a density
defining pseudo-volume-limited population of galaxies. This population
is defined as all galaxies with M_r(z_ref=0, Q=0.78) < -20.4 mag,
where Q defines the expected evolution of M_r as a function of
redshift. Q is taken from Loveday et al. (2014, in prep). Given the
depth of the GAMA I survey (r < 19.4 mag) the above absolute magnitude
limit implies a redshift (i.e. volume) limit of z=0.18333. However, in
order to account for the upper edge of the velocity range employed
when searching for nearby galaxies (see below), the environment
measurements are only provided for galaxies out to z=0.18. The exact
sample included in this DMU is: all GAMA DR2 galaxies in G15 with
redshift quality nQ > 2 (i.e. reliable redshifts) and within the
redshift limits of 0.002 < Z_TONRY <= 0.18.

This catalogue is based on DistancesFrames (which is itself based on
TilingCat), kCorrections and the GAMA I final completeness masks, and
uses H_0 = 70 km/s/Mpc, O_M = 0.3, O_L = 0.7.

#######################################################################

IMPORTANT NOTE:

On 2014-09-03 this DMU was upgraded from v01 to v02 following the
discovery of two bugs in v01. In v01 the faint limit of the density
defining population was incorrectly set to -20 mag. It has now been
set to the correct value of -20.4 mag. There was also a bug in the
flagging of galaxies. We furthermore took the opportunity to update
the value of Q from 0.87 (v01) to 0.78 (v02).

#######################################################################

We now describe the three environment measures provided by this DMU in
more detail.

SurfaceDensity:
This column provides the surface density based on the distance to the
5th nearest neighbour among the density defining population in a
velocity cylinder of +/-1000 km/s, i.e. 5 / (Pi * DistanceTo5nn^2).

CountInCyl:
This column provides the number of (other) galaxies from the density
defining population within a cylinder of co-moving radius 1 Mpc and a
velocity range of +/-1000 km/s. The overdensity is given by
CountInCyl / (nbar_ref * volume_of_cylinder)
where nbar_ref = 0.00703 Mpc^-3 is the average number density of the
density defining population.

AGEDensity:
This column provides the density of galaxies from the density defining
population in an adaptive Gaussian ellipsoid defined by
(r_a/(3*sigma))^2 + (r_z/(3*AGEScale*sigma))^2 <= 1, where r_a and r_z
are the distances from the centre in the plane of sky and along the
line-of-sight in co-moving Mpc, respectively, and sigma = 2 Mpc. The
adaptive scaling factor, AGEScale = 1 + (0.2*n_gals_within_2Mpc), is
used to scale the value of sigma along the redshift axis by up to a
factor of 3 (i.e. n_gals_within_2Mpc[max]=10) for the highest density
environments to compensate for the "finger-of-God" effect (Schawinski
et al. (2007), Thomas et al. (2010)).

#######################################################################

All unflagged environment measures are corrected for survey
incompleteness as (for example):
SurfaceDensity = SurfaceDensity_raw * (1 / Completeness),
where Completeness is the local completeness as given by the
completeness mask at the position of the galaxy, and not a completeness
averaged over the area or volume over which the environment measure is
determined.

#######################################################################

The errors on the environment measures are calculated as follows.

SurfaceDensityErr:
Calculated as the larger of
|(SurfaceDensity to 5th nearest neighbour) -
(SurfaceDensity to 4th nearest neighbour)|
and
|(SurfaceDensity to 5th nearest neighbour) -
(SurfaceDensity to 6th nearest neighbour)|

CountInCylErr:
Calculated as sqrt(CountInCyl).

AGEErr:
Calculated as sqrt(Ngals).
Note that this is the Poisson error on the number of galaxies found in
the adaptive Gaussian ellipsoid. It is *not* the error on AGEDensity.

#######################################################################

Below we describe the meanings of the various problem-indicating flags.

SurfaceDensityFlag:

Flag value Flag meaning
------------------------------------------------------------------
0 SurfaceDensity is exact.
1 The distance to the 5th nearest neighbour is larger
than the distance to the nearest angular survey
edge, but a nearer galaxy is within this distance.
The surface density is calculated using the
distance to the nearer galaxy and hence
SurfaceDensity is an upper limit.
2 No neighbours found among the density defining
population within the distance to the nearest
angular survey edge. SurfaceDensity is calculated
as 1 / (Pi * DistanceToEdge^2).
4 The galaxy lies inside a bright star exclusion
region (Completeness=-1) or outside of the GAMA
survey boundary (as defined by the completeness
mask, Completeness=-2). SurfaceDensity cannot be
determined accurately and is set to -999.9.

CountInCylFlag:

Flag value Flag meaning
------------------------------------------------------------------
0 CountInCyl is exact.
1 The cylinder extends across the nearest angular
survey edge. CountInCyl is a lower limit.
2 The galaxy lies inside a bright star exclusion
region (Completeness=-1) or outside of the GAMA
survey boundary (as defined by the completeness
mask, Completeness=-2). CountInCyl cannot be
determined accurately and is set to -999.9.

AGEDensityFlag:

Flag value Flag meaning
------------------------------------------------------------------
0 AGEDensity is exact.
1 The ellipsoid extends across the nearest angular
survey edge. AGEDensity is set to -999.9.
2 No (other) galaxies from the density defining
population are found within the ellipsoid (not due
to angular survey edge). AGEDensity is set to
-999.9.
4 The galaxy lies inside a bright star exclusion
region (Completeness=-1) or outside of the GAMA
survey boundary (as defined by the completeness
mask, Completeness=-2). AGEDensity cannot be
determined accurately and is set to -999.9.

#######################################################################

M_r:
Calculated as R_PETRO - Dmod70 - KCOR_(r,zref=0).

This DMU provides several different metrics of the local environment of GAMA DR2 galaxies: a surface density, the number of galaxies within a cylinder, and the density of galaxies within an adaptive Gaussian ellipsoid.

Tables
EnvironmentMeasures

EnvironmentMeasures

name: EnvironmentMeasures | type: CatalogueTable | Sarah Brough [javascript protected email address] | version v02 |

This catalogue provides three different environment measures for all GAMA DR2 galaxies in G15 with 0.002 < z < 0.18: a surface density, the number of galaxies within a cylinder, and the density of galaxies within an adaptive Gaussian ellipsoid.

Address this table as gama_dr2.EnvironmentMeasures

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
nQ	-	Redshift quality flag	meta.code.qual;src.redshift
Z_TONRY	-	Heliocentric redshift corrected for the effects of peculiar velocity	src.redshift
SurfaceDensityFlag	-	Flag indicating problems with surface density measurement (see notes)	meta.code.error;src.density
SurfaceDensityErr	Mpc^-2	Surface density uncertainty	src.density;stat.error
SurfaceDensity	Mpc^-2	Surface density based on the distance to the 5th nearest neighbour	src.density
RA	deg	J2000	pos.eq.ra
M_r	mag	Extinction and k-corrected absolute r-band magnitude	phys.magAbs
DistanceToEdge	Mpc	Distance to nearest angular survey edge in co-moving units	pos.distance
DistanceTo5nn	Mpc	Distance to 5th nearest neighbour in co-moving units	pos.distance
DEC	deg	J2000	pos.eq.dec
CountInCylFlag	-	Flag indicating problems with CountInCyl (see notes)	meta.code.error;src.density
CountInCylErr	-	Poisson error on number of galaxies in cylinder	stat.error;src.density
CountInCyl	-	Number of (other) galaxies within cylinder of radius 1 co-moving Mpc	src.density
Completeness	-	Value used to correct environment measures for local survey incompleteness (see notes)	arith.factor
CATAID	-	Unique GAMA ID	meta.id
AGEScale	-	Adaptive scaling factor for adaptive Gaussian ellipsoid	arith.factor
AGEErr	-	Poisson error on the number of galaxies used to calculate AGEDensity	src.density;stat.error
AGEDensityFlag	-	Flag indicating problems with AGEDensity, see notes	meta.code.error;src.density
AGEDensity	Mpc^-3	Density of galaxies within an adaptive Gaussian ellipsoid	src.density

ExternalSpec

name: ExternalSpec | type: CatalogueGroup | Joe Liske [javascript protected email address] | version v01 |

ExternalSpec
2011-03-03
Joe Liske

The ExternalSpec DMU collects spectra of GAMA DR2 objects from
existing spectroscopic surveys. The spectra were taken from the
following surveys:

Survey # of spectra
------------------------------------------------
SDSS DR7 16267
2dFGRS Final data release 11906
2QZ Final data release 150
MGC Final data release 2154
2SLAQ-LRG Final data release 44
2SLAQ-QSO Final data release 43
WiggleZ DR1 16
6dFGS Final data release 248
------------------------------------------------
Total 30828

Duplicate observations have been included (except in the case of
WiggleZ). The spectra are provided as 1D fits files and are available
from the GAMA DR2 fileserver in the directory spectra/. The files are
essentially those that are provided by the various surveys, except
that multiple extensions (sometimes used to store duplicate
observations) are extracted to individual files. For each spectrum we
have also added its entry from the ExternalSpecAll table (see below)
to the fits header. In case of conflicts with existing keywords, these
were first renamed.

See the directory descriptions for the various survey data on the GAMA
fileserver for more details.

-----------------------------------------------------------------------

Apart from the spectra, this DMU also produces the table
ExternalSpecAll, which lists all of the available external spectra
(including all duplicate observations) as well as their redshifts as
determined by the originating surveys. In addition, the table
ExternalSpec is provided, which lists only the those external spectra
that provide the best redshifts for GAMA DR2 objects. Both are in the
same format and the latter is an exact subset of the former. In fact,
ExternalSpec is a "view" of ExternalSpecAll. It lists only those
entries with IS_SBEST = TRUE, meaning that it excludes intra-survey
duplicate observations. However, it still includes inter-survey
duplications.

In the following we provide additional information for some of the
parameters in these tables:

SPECID:
-------
This is the spectrum's unique identifier as used in the GAMA DR2
database. The value of this parameter depends on the orginating survey
of the spectrum:

SDSS: specObjID
2dFGRS: "2dF"SEQNUM (+ _n for duplications, where n=2,3,4)
2QZ: "2QZ"IAUNAMEx (where x=a,b,c,d,e,f)
MGC: "MGC"ID (+ _n for duplications, where n=2,3,4,5)
2SLAQ-LRG: "2SL"IAUNAME_n (where n=1,2,3,4)
2SLAQ-QSO: "2SL"IAUNAME_FLD_DATE
WiggleZ: "W"n (where n is a multi-digit number taken from the file name)
6dFGS: "6dF"TARGETNAME (+ _n for duplications, n=2)

nQ:
---
This is a redshift quality flag. We have attempted to translate the
redshift qualities of the various surveys to the GAMA system (nQ =
0-4, with nQ >= 3 used for science):

SDSS:
nQ = 1 + (zconf > 0.2) + (zwarning_ok && zconf > 0.7) +
(zconf > 0.9) + (zconf > 0.99)
where zwarning_ok is 1 if there are no absorption or emission line
redshift inconsistencies and the 4000 A break is not too large.
Note that in the case of the SDSS we allow nQ = 5 because of the
exceptional reliability of these redshifts.

2dFGRS:
If QUALITY = 5 then nQ = 4, else nQ = QUALITY.

2QZ:
nQ QUALTHIS
-------------------
3 11
2 12,21,22
1 23,33

MGC:
If Z_QUAL = 5 then nQ = 4, else nQ = Z_QUAL.

2SLAQ-LRG:
If qop >= 3 then nQ = 3, else nQ = qop.

2SLAQ-QSO:
nQ qual
-------------------
3 11
2 12,21,22
1 23,33

WiggleZ:
If Qop >= 3 then nQ = 3, else nQ = Qop.

6dFGS:
If QUALITY >= 3 then nQ = 3, else nQ = QUALITY.

PROB:
-----
This parameter is set to zconf for spectra from the SDSS, and to 0 in
all other cases.

CATAID / GAMA_NAME:
-------------------
These parameters identify the GAMA object the spectrum was matched to.
For a given spectrum a matching GAMA object was identified by finding
the spectrum's closest GAMA object (within 2 arcsec) in the catalogue
resulting from the union of TilingCat and SpStandards from the
InputCat DMU.

IC_FLAG:
--------
This is a bitwise flag identifying the catalogue(s) in which the
matched GAMA object was found:

Bit n 2^(n-1) Catalogue
------------------------------
1 1 InputCatA
2 2 TilingCat
3 4 SpStandards

DIST:
-----
Distance between the spectrum and the matched GAMA object in arcsec.

IS_SBEST:
---------
In cases where multiple spectra from a given survey were matched to
the same GAMA object this flag identifies the spectrum that provides
the best redshift for that object.

SDSS:
The spectrum providing the best redshift was identified by first
considering only sciencePrimary spectra with nQ >= 3 and within 1
arcsec of the object. If there were multiple, then we selected the one
with the highest nQ value. If there were multiple with the same nQ
value, we selected the closest spectrum. In cases without any nQ >= 3
sciencePrimary spectra within 1 arcsec we simply selected first by nQ,
then by distance.

All other surveys:
The spectrum providing the best redshift was selected first by nQ, and
then (in cases of multiple spectra with the same nQ) by distance
between the object and the spectrum.

-----------------------------------------------------------------------

This DMU also provides the table ExternalzAll which contains a
relatively small number of redshifts from various literature sources,
where the original spectra from which these redshifts were measured
are not available to GAMA.

Redshifts have been collected from the following sources:

Survey # of redshifts Source
---------------------------------------------------------------------
NED 3 NED website
Updated Zwicky Catalog 214 VizieR: J/PASP/111/438
---------------------------------------------------------------------
Total 217

All redshifts were matched to GAMA objects in the same way as the
spectra above.

SPECID:
-------
NED: "NED_"common_name
UZC: "UZC"serial_number

nQ and PROB:
------------
NED: nQ = 3
PROB = 0.0
UZC: nQ = 3 if UZC_class = 0 or 1, else nQ = 2
PROB = 0.0

This DMU collects spectra for GAMA DR2 objects from previous spectroscopic surveys such as the SDSS.

Tables
ExternalSpecAll
ExternalSpec
ExternalzAll

ExternalSpecAll

name: ExternalSpecAll | type: CatalogueTable | Joe Liske [javascript protected email address] | version v01 |

This table lists all spectra of GAMA DR2 objects that are available from previous spectroscopic surveys (such as the SDSS), including duplicate observations. Every spectrum listed in this table is available in the GAMA DR2 database.

Address this table as gama_dr2.ExternalSpecAll

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
Z	-	Heliocentric redshift	src.redshift
WMIN	A	Minimum wavelength of spectrum	em.wl;stat.min
WMAX	A	Maximum wavelength of spectrum	em.wl;stat.max
URL_IMG	-	URL of the spectrum`s image	meta.ref.url;meta.file
URL	-	URL of the spectrum	meta.ref.url;meta.file;meta.fits
SURVEY	-	Survey this spectrum originated from	meta.dataset
SPECID	-	Unique ID of spectrum	meta.id;meta.main
RA	deg	RA of spectrum (J2000)	pos.eq.ra
PROB	-	Probability that redshift is correct	stat.probability;src.redshift
NQ	-	Normalised redshift quality (use nQ > 2 for science)	meta.code.qual;src.redshift
IS_SBEST	-	Is this the spectrum with the best redshift of this GAMA object within the originating survey?	meta.code
IC_FLAG	-	Catalogue source(s) of matched GAMA object	meta.code.member
GAMA_NAME	-	Name of matched GAMA object	meta.id.cross;src
FILENAME	-	Full path and filename of the spectrum	meta.id;meta.file;meta.fits
DIST	arcsec	Distance between spectrum and matched GAMA object	pos.angDistance
DEC	deg	DEC of spectrum (J2000)	pos.eq.dec
CATAID	-	ID of matched GAMA object	meta.id.cross;src

ExternalSpec

name: ExternalSpec | type: CatalogueTable | Joe Liske [javascript protected email address] | version v01 |

This table lists those spectra from previous spectroscopic surveys (such as the SDSS) that provide the best redshifts for GAMA DR2 objects. This table is an exact subset of the table ExternalSpecAll. It lists only those entries with IS_SBEST = TRUE, meaning that it excludes intra-survey duplicate observations. However, it still includes inter-survey duplications.

Address this table as gama_dr2.ExternalSpec

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
Z	-	Heliocentric redshift	src.redshift
WMIN	A	Minimum wavelength of spectrum	em.wl;stat.min
WMAX	A	Maximum wavelength of spectrum	em.wl;stat.max
URL_IMG	-	URL of the spectrum`s image	meta.ref.url;meta.file
URL	-	URL of the spectrum	meta.ref.url;meta.file;meta.fits
SURVEY	-	Survey this spectrum originated from	meta.dataset
SPECID	-	Unique ID of spectrum	meta.id;meta.main
RA	deg	RA of spectrum (J2000)	pos.eq.ra
PROB	-	Probability that redshift is correct	stat.probability;src.redshift
NQ	-	Normalised redshift quality (use nQ > 2 for science)	meta.code.qual;src.redshift
IS_SBEST	-	Is this the spectrum with the best redshift of this GAMA object within the originating survey?	meta.code
IC_FLAG	-	Catalogue source(s) of matched GAMA object	meta.code.member
GAMA_NAME	-	Name of matched GAMA object	meta.id.cross;src
FILENAME	-	Full path and filename of the spectrum	meta.id;meta.file;meta.fits
DIST	arcsec	Distance between spectrum and matched GAMA object	pos.angDistance
DEC	deg	DEC of spectrum (J2000)	pos.eq.dec
CATAID	-	ID of matched GAMA object	meta.id.cross;src

ExternalzAll

name: ExternalzAll | type: CatalogueTable | Joe Liske [javascript protected email address] | version v01 |

This table lists a few redshifts of GAMA DR2 objects taken from the literature. The spectra from which these redshifts were measured are NOT available in the GAMA DR2 database.

Address this table as gama_dr2.ExternalzAll

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
Z	-	Heliocentric redshift	src.redshift
SURVEY	-	Survey this spectrum originated from	meta.dataset
SPECID	-	Unique ID of spectrum	meta.id;meta.main
RA	deg	RA of spectrum (J2000)	pos.eq.ra
PROB	-	Probability that redshift is correct	stat.probability;src.redshift
NQ	-	Normalised redshift quality (use nQ > 2 for science)	meta.code.qual;src.redshift
IC_FLAG	-	Catalogue source(s) of matched GAMA object	meta.code.member
GAMA_NAME	-	Name of matched GAMA object	meta.id.cross;src
DIST	arcsec	Distance between spectrum and matched GAMA object	pos.angDistance
DEC	deg	DEC of spectrum (J2000)	pos.eq.dec
CATAID	-	ID of matched GAMA object	meta.id.cross;src

GalexPhotometry

name: GalexPhotometry | type: CatalogueGroup | Ellen Andrae [javascript protected email address] | version v02 |

GalexPhotometry
2012-11-13
Ellen Andrae

This DMU provides GALEX NUV and FUV photometry for GAMA DR2 objects.

The GALEX ultraviolet data are a combination of archival data and
pointed observations from the GALEX guest investigator (GI) program
GALEX-GAMA: UV/Optical/Near-IR/Far-IR/Radio observations of ~100k
galaxies (GI5-048; PIs: R. Tuffs, C. Popescu, US-PI: M. Seibert). The
archival data have been used to extend the ultraviolet coverage of the
GAMA regions as much as possible.

The website of the GALEX-GAMA project is
www.mpi-hd.mpg.de/galex-gama/.

This DMU provides several tables:

- GalexPhot
GALEX NUV and FUV photometry in the GAMA I survey regions provided
by the GALEX SExtractor-based pipeline.

- GalexObsInfo
Basic GALEX observational info for all GAMA DR2 objects, including
detection limits for the GALEX SExtractor-based pipeline.

- GalexSimpleMatch
Result for GAMA DR2 objects of a simple nearest neighbour match
between GalexPhot and InputCatA (within 4 arcsec).

- GalexAdvancedMatch
Result for GAMA DR2 objects of an advanced match between GalexPhot
and InputCatA. The advanced matching procedure attempts to
reconstruct the true UV flux of a given GAMA object in cases where
multiple GAMA and GALEX objects are associated with each other.

- GalexCoGPhot
GALEX NUV and FUV curve-of-growth photometry at the optical
positions of all GAMA DR2 objects.

- GalexMain
This is the main catalogue of this DMU. It should cover the needs of
most users. It duplicates the most important information from the
other catalogues in this DMU, and provides estimates of the "best"
NUV and FUV fluxes for all GAMA DR2 objects that were detected by
GALEX.

Dependencies
============
This DMU used the following inputs:

External GALEX pipeline v7
InputCat InputCatA v05
SersicPhotometry SersicCat v07

GALEX data
==========
All GI and archival data overlapping the GAMA I survey regions and
available as of 30 March 2010 were compiled for this project,
resulting in 212 GALEX tiles (circular fields 1 degree wide). These
data cover between 70% and 95% of the three equatorial regions.

Unique area (Primary vs Secondary)
==================================
GALEX tiles overlap one another. This, of course, is inevitable when
trying to cover a contiguous area with circular fields of view.
Furthermore, because we include archival survey data which is observed
on a sky grid system and pointed observations (which are not on the
sky grid system) the overlap is often very hap-hazard. There are
several ways to handle this such that we include only unique
detections and allow a precise footprint computation. We use a method
that optimizes the areal coverage and weights tiles with FUV coverage
highest.

For each GAMA region the GALEX tiles are rank-sorted by FUV exposure
time and secondary rank-sorted by NUV exposure time. This ensures that
any tile with FUV coverage takes precedence over any tile with only
NUV coverage (note that the FUV detector on GALEX is non-operational
at this time).

Once sorted, the footprint of each tile is derived from the relative
response map (effective exposure time map) by comparing it to all
neighboring tiles with a higher rank-order. In this way a "primary
map" is made for each tile indicating which parts of the field of view
are to be considered "primary" and which parts are to be considered
"secondary".

In this DMU we only consider the primary areas.

Note that photometric data from the secondary areas as provided by the
GALEX SExtractor-based pipeline are available at the GALEX-GAMA
website.

Photometry
==========
None of the fluxes and magnitudes presented in this DMU have been
corrected for the effect of foreground Milky Way dust extinction.
Should these corrections be required, they can be obtained from the
table GalacticExtinction in the InputCat DMU.

All photometry is on the AB system.

The photomtery produced by the GALEX SExtractor-based pipeline is
accompanied by artifact warning flags. We have *not* excluded any
objects from any tables in this DMU based on these flags. However, we
strongly recommend to select against objects that have the DICHROIC
REFLECTION or WINDOW REFLECTION flags raised as these reflections to
could lead to seriously corrupted fluxes (see the notes of the
GalexPhot table for details).

This DMU provides GALEX NUV and FUV photometry for GAMA DR2 objects.

Tables
GalexAdvancedMatch
GalexCoGPhot
GalexMain
GalexObsInfo
GalexPhot
GalexSimpleMatch

GalexAdvancedMatch

name: GalexAdvancedMatch | type: CatalogueTable | Ellen Andrae [javascript protected email address] | version v02 |

GalexPhotometry
GalexAdvancedMatch
v02
2012-11-13
Ellen Andrae

This catalogue contains the result of an advanced matching procedure
between InputCatA (GAMA's SDSS-based input catalogue^*) and GalexPhot.
The matching procedure takes into account the possibility of multiple
matches between GALEX and GAMA objects and seeks to reconstruct the
original UV flux of a given GAMA object.

This catalogue only includes matched GAMA DR2 objects with
S/N_NUV >= 2.5 in the redistributed flux FLUXSPLIT_NUV (see below).

Unmatched GAMA DR2 objects are not included in this catalogue. Refer to
the table GalexObsInfo for detection limits and to distinguish between
GAMA objects that were not detected in the GALEX data and those that
were not covered by GALEX.

Description of advanced matching procedure
==========================================
The advanced matching procedure takes into account the possibility of
multiple matches between GALEX and GAMA objects and seeks to
reconstruct the true UV flux of a given GAMA object.

We illustrate the routine for an example GAMA object. First, optical
shape information for the object (r-band ellipticity, position angle,
and effective radius) is extracted from the catalogue SersicCat,
and used to define a target area within which GALEX counterparts will
be deemed to be associated with the GAMA object. To take into account
scatter in apparent positions from real positions in the UV and
possibly unavailable optical shape information, the minimal search
region, i.e. optical target area, is a circle of radius 4 arcsec (the
matching radius used in GalexSimpleMatch). The question that is then
to be answered is which GALEX objects in GalexPhot have their central
coordinates within this optically defined search region. The number,
the IDs and the total flux of all such GALEX objects are recorded in
columns NMATCHUV, UVIDXLIST and FLUXTOT_XXX, respectively.

Since it is possible that a GALEX object may itself be extended, or
that it has more than one potential close-lying optical counterpart in
InputCatA, we also need to take into account the possibility that one
or more of the GALEX objects in the search region around the GAMA
object may themselves be related to further GAMA objects. Hence, in
the second step of the advanced matching procedure, a UV area is
constructed for each GALEX object within the optical search region,
using the object's position angle, ellipticity and size along its
semimajor axis from GalexPhot. InputCatA is then searched for GAMA
objects within the UV area of each of the GALEX objects. The number
and IDs of the GAMA objects found in this step are recorded in the
columns NMATCHOPT and OPTIDXLIST^*. The columns NMATCHUV and UVIDXLIST
for the GAMA objects found in this step are updated to include this
GALEX object.

In cases where there is a 1-to-1 match all of the flux of the GALEX
object is attributed to the matching GAMA object. This is by far the
most common case (68%). If, however, there is more than one potential
optical counterpart to one or more of the GALEX objects in the optical
search region, the UV flux of each of the GALEX objects is split among
all potential optical counterparts of that GALEX object, weighted
inversely by angular distance (using a minimum distance of 0.3 arcsec
to account for positional errors). Finally, the UV flux contributions
from all of the GALEX objects in the optical search radius to the GAMA
object under consideration are summed up and recorded in the columns
FLUXSPLIT_XXX. FLUXSPLITERR_XXX is the square-root of the weighted
quadratic sum of the errors of all GALEX objects from which the object
under consideration received a flux contribution, where the weights in
the quadratic sum are the same weights as those used for the flux
itself.

Finally, we purge from the catalogue all GAMA objects with
FLUXSPLIT_NUV / FLUXSPLITERR_NUV < 2.5.

Note that in cases where there is a 1-to-1 match between a GAMA and a
GALEX object we have FLUXTOT_XXX = FLUXSPLIT_XXX. Furthermore, in
these cases FLUXTOT_XXX is equal to FLUX_XXX from GalexPhot of the
GALEX object identified as the GAMA object's nearest GALEX neighbour
in GalexSimpleMatch. In other words, in these "simple" cases the
advanced matching procedure returns the same result for the UV fluxes
of a given GAMA object as the simple nearest neighbour matching.

Also note that it is possible for a GAMA object not to have a
FLUXTOT_XXX value associated with it but to still have a FLUXSPLIT_XXX
value associated with it. This will happen if there are no GALEX
objects within the GAMA object's optical search region (leading to
FLUXTOT_XXX being set to its default value of -99.0) and if the GAMA
object lies inside the UV search region(s) of one or more GALEX
objects, which in turn lie in the optical search region of at least
one other GAMA object. In this case the first GAMA object participates
in the re-distribution of the UV flux from these GALEX objects,
leading to FLUXSPLIT_XXX values != -99.0.

We also point out that there are substantial differences between the
objects included in this catalogue and those included in
GalexSimpleMatch. An object may be included in this catalogue but not
in GalexSimpleMatch and vice versa. The former happens when a GAMA
object is more than 4 arcsec away from its nearest GALEX neighbour but
still receives flux from one or more GALEX objects during the flux
re-distribution (with S/N_NUV >= 2.5). The latter happens when the
flux redistribution results in the S/N of the NUV flux received by a
GAMA object listed in GalexSimpleMatch dropping below the threshold of
2.5.

We recognise that the above flux redistribution scheme may not be
optimal, and that users may wish to apply other recipes for
distributing the UV flux among the optical counterparts (e.g. using
additional prior astrophysical information). This is easily achieved
given that we identify all GALEX and GAMA objects involved in a given
match in the columns UVIDXLIST and OPTIDXLIST^*.

We caution that the UV flux estimates reported in columns
FLUXSPLIT_XXX are only correct in a statistical sense, i.e. when
considering a large population of objects. However, for individual
objects they are necessarily imprecise.

The default value for non-measurements is -99.0.

^* Additional note
==================
This catalogue is actually slightly inconsistent with the rest of the
GAMA DR2 because the advanced matching procedure described above was
carried out using v06 of InputCatA, whereas the version released in
DR2 is v05. InputCatAv05 is the GAMA I master input catalogue, whereas
InputCatAv06 is the version used for GAMA II. v06 was chosen for the
advanced matching between GalexPhot and InputCatA because it has a
slightly fainter flux limit than v05 (r < 20.0 in v06 vs. r < 19.8 in
v05), and because it includes point sources (which were excluded from
v05). Both of these differences should make the matching and flux
re-distribution more reliable.

As explained above, column OPTIDXLIST lists all GAMA objects (using
the SDSS identifier OBJID) that are involved in the matching. However,
since InputCatAv06 contains significantly more objects than v05, a
number of the objects listed in column OPTIDXLIST are not found in
InputCatAv05 as released in GAMA DR2. To be precise, of the 62,036
unique objects listed in column OPTIDXLIST 9686 are not in
InputCatAv05.

Furthermore, we note that InputCatAv05 is based on SDSS DR6, whereas
InputCatAv06 is based on SDSS DR7. The SDSS OBJID used in column
OPTIDXLIST is hence the SDSS DR7 OBJID. However, since a small
fraction of objects changed their SDSS OBJID between DR6 and DR7,
there are 546 objects that are listed in column OPTIDXLIST with a
different OBJID than that used in InputCatAv05.

This catalogue contains the result of an advanced match between InputCatA and GalexPhot, listing only objects included in DR2. The matching procedure takes into account the possibility of multiple matches between GALEX and GAMA objects and seeks to reconstruct the original UV flux of a given GAMA object. GAMA DR2 objects without a GALEX match are not included in this catalogue.

Address this table as gama_dr2.GalexAdvancedMatch

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
UVIDXLIST	-	ID list of GALEX object used in the flux redistribution calculation using NAME from GalexPhot; string always ends with a comma	-
OPTIDXLIST	-	ID list of GAMA objects used in the flux redistribution calculation using SDSS OBJID; string always ends with a comma	-
OBJID	-	SDSS objid	meta.id
NUVFLAG	-	Combination of the NUV artifact flags of all GALEX objects involved in the matching	meta.code;em.UV.200-300nm
NMATCHUV	-	Number of GALEX objects involved in the matching	meta.number
NMATCHOPT	-	Number of GAMA objects involved in the matching	meta.number
MAGTOT_NUV	mag	Total NUV AB magnitude of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.mag;em.UV.200-300nm
MAGTOT_FUV	mag	Total FUV AB magnitude of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.mag;em.UV.100-200nm
MAGTOTERR_NUV	mag	Total NUV AB magnitude error	phot.mag;em.UV.200-300nm;stat.error
MAGTOTERR_FUV	mag	Total FUV AB magnitude error	phot.mag;em.UV.100-200nm;stat.error
MAGSPLIT_NUV	mag	Redistributed NUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.200-300nm
MAGSPLIT_FUV	mag	Redistributed FUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.100-200nm
MAGSPLITERR_NUV	mag	Redistributed NUV AB magnitude error	phot.mag;em.UV.200-300nm;stat.error
MAGSPLITERR_FUV	mag	Redistributed FUV AB magnitude error	phot.mag;em.UV.100-200nm;stat.error
FUVFLAG	-	Combination of the FUV artifact flags of all GALEX objects involved in the matching	meta.code;em.UV.100-200nm
FLUXTOT_NUV	microJy	Total NUV flux of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.flux;em.UV.200-300nm
FLUXTOT_FUV	microJy	Total FUV flux of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.flux;em.UV.100-200nm
FLUXTOTERR_NUV	microJy	Total NUV flux error	phot.flux;em.UV.200-300nm;stat.error
FLUXTOTERR_FUV	microJy	Total FUV flux error	phot.flux;em.UV.100-200nm;stat.error
FLUXSPLIT_NUV	microJy	Redistributed NUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.200-300nm
FLUXSPLIT_FUV	microJy	Redistributed FUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.100-200nm
FLUXSPLITERR_NUV	microJy	Redistributed NUV flux error	phot.flux;em.UV.200-300nm;stat.error
FLUXSPLITERR_FUV	microJy	Redistributed FUV flux error	phot.flux;em.UV.100-200nm;stat.error
CATAID	-	Unique ID of GAMA object	meta.id

GalexCoGPhot

name: GalexCoGPhot | type: CatalogueTable | Ellen Andrae [javascript protected email address] | version v02 |

GalexPhotometry
GalexCoGPhot
v02
2012-11-13
Ellen Andrae

In addition to the GALEX-pipeline-generated photometry of "blind"
GALEX NUV detections presented in GalexPhot, we provide in this
catalogue NUV and FUV photometric measurements at the a priori known
optical positions of GAMA DR2 objects using a curve-of-growth (CoG)
method.

Our CoG method (described in detail below) requires not only the
positions but also the ellipticities and position angles of the
galaxies to be photometered. We take this information from the most
reliable source of shape information for GAMA galaxies, SersicCatAll
in the SersicPhotometry DMU.

Description of CoG method
=========================
For each object to be analysed, the local background level and its
(Poissonian) error, sigma_bkg, is estimated in the NUV/FUV data at the
object's optical position, and the background is subtracted. An
elliptical aperture is constructed from the object's r-band position,
effective radius (GAL_RE_R), ellipticity (GAL_ELLIP_R) and position
angle (GAL_PA_R) from SersicCatAll. This aperture is then convolved
with the GALEX PSF, assumed to be a Gaussian with a FWHM of 5.3 arcsec.

The flux is then averaged in elliptical annuli of the above shape of
width 3 arcsec (as measured along the object's major axis). The
"integration radius" (along the major axis) of the target is then
defined as the smaller of the following: the outer radius of the
smallest annulus in which the average flux falls below the background
level plus 1.0 sigma_bkg or the outer radius + 3 arcsec of the
smallest annulus in which the average flux falls below the background
level plus 1.5 sigma_bkg. This was found to be a good compromise
between including very faint target emission at large radii on the one
hand and the need to avoid pure noise integration or blending with
neighbouring objects on the other. This integration radius is listed
in columns RE_CRIT_XXX in the catalogue.

Objects for which the flux in the innermost annulus (0-3 arcsec) is
already below the level of the background plus 1.5 sigma_bkg have
RE_CRIT_XXX set to 0. Furthermore, objects with RE_CRIT_XXX = 3 arcsec
must also be considered non-detections since they are smaller than the
GALEX PSF.

The flux of the target is then determined by integrating the flux
inside the elliptical aperture of size RE_CRIT_XXX. If this flux is
negative (i.e. a complete non-detection) then all flux columns are set
to 99. Note that apart from this "cut", all flux measurements are
reported in this catalogue, i.e. no S/N limit is applied.

In order to avoid contamination from neighbouring sources (taken from
InputCatA), a circular area with a radius (not diameter) of 5.3 arcsec
is masked around these. Any masked pixels inside a galaxy's
integration aperture are accounted for by renormalizing the unmasked
galaxy flux measured in the same elliptical annuli as the masked
pixels. Galaxies where this was necessary are flagged in the columns
CONFSOURCE_XXX. Objects for which the flux profile never reaches the
level of the background plus 1.5 sigma_bkg due to the flux of
neighbouring objects outside of their masks have their fluxes set to
999. Objects with a masked area in the central radius bin are deemed
to be unmeasurable and their flux values are set to -99.

Objects with RE_CRIT_NUV > RE_CRIT_FUV + 30 arcsec are very likely to
have a NUV measurement that was contaminated by a neighboring
source. (Especially stars tend to be much fainter in the FUV, thus
even very bright stars are very unlikely to have excess FUV flux
outside the masked area, even though they may have excess NUV flux
outside the masked area.) Therefore, all NUV columns are set to 999 in
these cases.

Objects not covered by the GALEX data (or those where the coverage of
the surroundings was not sufficient for a background estimate) also
have their fluxes set to -99.

This catalogue provides GALEX NUV and FUV curve-of-growth photometry for all GAMA DR2 objects.

Address this table as gama_dr2.GalexCoGPhot

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
RE_CRIT_NUV	arcsec	NUV integration radius (multiple of 3 arcsec)	phys.size.radius;em.UV.200-300nm
RE_CRIT_FUV	arcsec	FUV integration radius (multiple of 3 arcsec)	phys.size.radius;em.UV.100-200nm
OBJID	-	SDSS objid	meta.id
MAG_NUV	mag	NUV magnitude	phot.mag;em.UV.200-300nm
MAG_FUV	mag	FUV magnitude	phot.mag;em.UV.100-200nm
MAGERR_NUV	mag	NUV magnitude error	phot.mag;em.UV.200-300nm;stat.error
MAGERR_FUV	mag	FUV magnitude error	phot.mag;em.UV.100-200nm;stat.error
HP_RAD_NUV	arcsec	NUV radius enclosing 50% of the total flux	phys.size.radius;em.UV.200-300nm
HP_RAD_FUV	arcsec	FUV radius enclosing 50% of the total flux	phys.size.radius;em.UV.100-200nm
FLUX_NUV	microJy	NUV flux	phot.flux;em.UV.200-300nm
FLUX_FUV	microJy	FUV flux	phot.flux;em.UV.100-200nm
FLUXERR_NUV	microJy	NUV flux error	phot.flux;em.UV.200-300nm;stat.error
FLUXERR_FUV	microJy	FUV flux error	phot.flux;em.UV.100-200nm;stat.error
CPS_NUV	counts/s	NUV counts per second	phot.count;em.UV.200-300nm
CPS_FUV	counts/s	FUV counts per second	phot.count;em.UV.100-200nm
CPSERR_NUV	counts/s	NUV counts per second error	phot.count;em.UV.200-300nm;stat.error
CPSERR_FUV	counts/s	FUV counts per second error	phot.count;em.UV.100-200nm;stat.error
CONFSOURCE_NUV	-	NUV flag indicating whether masking occurred	meta.code
CONFSOURCE_FUV	-	FUV flag indicating whether masking occurred	meta.code
CATAID	-	Unique ID of GAMA object	meta.id

GalexMain

name: GalexMain | type: CatalogueTable | Ellen Andrae [javascript protected email address] | version v02 |

GalexPhotometry
GalexMain
v02
2012-11-13
Ellen Andrae

This is the main catalogue of the GalexPhotometry DMU. It reproduces
the most important information from the other catalogues in this DMU
and provides a best estimate of the NUV and FUV fluxes of all GAMA DR2
objects that were detected by GALEX.

Included in this catalogue are all GAMA DR2 objects that either

- have an entry in GalexSimpleMatch
or
- have an entry in GalexAdvancedMatch
or
- have an entry in GalexCoGPhot with S/N_NUV >= 2.5 and integration
radius RE_CRIT_NUV >= 6 arcsec

The S/N criterion applied to GalexCoGPhot is the same as that used for
GalexPhot and GalexAdvancedMatch. Note that GAMA DR2 objects that were
not detected by GALEX (in the sense that they do not match any of the
criteria above) are not included in this catalogue. Refer to the table
GalexObsInfo for nominal detection limits and to distinguish between
GAMA objects that were not detected in the GALEX data and those that
were not covered by GALEX. For DR2 objects not included in the present
catalogue you can also turn to the table GalexCoGPhot to find out if
they were "detected" at S/N_NUV < 2.5, i.e. essentially to find upper
flux limits for these objects.

This catalogue provides the following information:

- In columns 50-75 (NN_GGOID - NN_POSANGERR_NUV) we reproduce the main
information on the GAMA object's nearest neighbour GALEX object from
GalexPhot (catalogue of UV detections and photometry from the GALEX
SExtractor-based pipeline), using GalexSimpleMatch to connect the
two. The columns NN_FLUX_XXX contain the fluxes of the nearest
neighbour GALEX object as measured by the GALEX SExtractor-based
pipeline. For more information refer to the notes of the
GalexSimpleMatch and GalexPhot tables.

- In columns 16-35 (NMATCHUV - SPLIT_MAGERR_FUV) we reproduce the main
information from GalexAdvancedMatch. This table contains the result
(for GAMA DR2 objects) of an advanced match between GalexPhot and
InputCatA. The advanced matching procedure attempts to reconstruct
the true UV flux of a given GAMA object in cases where multiple GAMA
and GALEX objects are associated with each other. This reconstructed
flux is reported in columns SPLIT_FLUX_XXX. The columns TOT_FLUX_XXX
contain the total flux of all GALEX objects associated with a given
GAMA object. For more information refer to the notes of the
GalexAdvancedMatch table.

- In columns 36-49 (COG_FLUX_NUV - COG_CONFSOURCE_FUV) we reproduce
the main information from GalexCoGPhot. This table contains
photometric measurements (using a curve-of-growth method) at the a
priori known optical positions of GAMA objects. The columns
COG_FLUX_XXX contain the fluxes returned by the CoG method. For more
information refer to the notes of the GalexCoGPhot table.

- In columns 7-15 (BEST_FLUX_NUV - BEST_METHOD) we report our best
estimate of the NUV and FUV fluxes of a given GAMA object. In these
columns we make appropriate choices among the various fluxes
available for a given object (from the advanced matching or CoG
methods), and we strongly recommend the use of these BEST fluxes.

In cases where there is an unambiguous 1-to-1 correspondence between
a GAMA and a GALEX object we believe the fluxes returned by the
GALEX pipeline for the GALEX object to be the most appropriate. Note
that in these cases the nearest neighbour and advanced matching
procedures of course return the same results for the UV fluxes of a
given GAMA object, i.e. NN_FLUX_XXX = TOT_FLUX_XXX = SPLIT_FLUX_XXX.

In cases where the GAMA object is very extended or where there are
multiple GAMA and/or GALEX objects associated with each other we
believe our CoG photometry to be superior.

However, in cases where the CoG measurements have failed (for
whatever reason, see the notes of the GalexCoGPhot table) we resort
to the reconstructed fluxes SPLIT_FLUX_XXX returned by the advanced
matching procedure.

We therefore set BEST_FLUX_XXX according to the following rules:

- If only one of COG_FLUX_NUV and SPLIT_FLUX_NUV is available in
this catalogue then the BEST columns are set to the corresponding
columns of the available flux method.

- If both COG_FLUX_NUV and SPLIT_FLUX_NUV are available in this
catalogue then the BEST columns are set to the corresponding
columns of the CoG method if NMATCHUV > 1 or NMATCHOPT > 1 or
GAL_RE_R > 10 arcsec, where GAL_RE_R is the r-band effective
radius from SersicCatAll. Otherwise the BEST columns are set to
the corresponding SPLIT columns.

The flux method used for the BEST columns is recorded in column
BEST_METHOD (CoG or AdvancedMatch).

Note that for a COG_FLUX_NUV value to be present *in this catalogue*
it must have S/N >= 2.5 (see above).

Also note that there are 250 objects in this catalogue with neither
AdvancedMatch nor CoG entries. These objects were included here only
because they have an entry in GalexSimpleMatch, meaning they have at
least one S/N_NUV >= 2.5 GALEX object from GalexPhot within 4 arcsec.
However, all of these have multiple GALEX objects associated with
them. Hence one should not be tempted to use the UV flux of the
nearest GALEX neighbour as the BEST flux in these cases.

The default value for missing entries in this table is -999.

This is the main catalogue of the GalexPhotometry DMU. It reproduces the most important information from the other catalogues in this DMU and provides a best estimate of the NUV and FUV fluxes of all GAMA DR2 objects that were detected by GALEX.

Address this table as gama_dr2.GalexMain

Name	Unit	Description	UCD (hover for description)
Name	Unit	Description	UCD
TOT_MAG_NUV	mag	Total NUV AB magnitude of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.mag;em.UV.200-300nm
TOT_MAG_FUV	mag	Total FUV AB magnitude of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.mag;em.UV.100-200nm
TOT_MAGERR_NUV	mag	Error on total NUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.200-300nm;stat.error
TOT_MAGERR_FUV	mag	Error on total FUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.100-200nm;stat.error
TOT_FLUX_NUV	microJy	Total NUV flux of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.flux;em.UV.200-300nm
TOT_FLUX_FUV	microJy	Total FUV flux of all GALEX objects associated with GAMA object (unweighted sum of the flux)	phot.flux;em.UV.100-200nm
TOT_FLUXERR_NUV	microJy	Error on the total NUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.200-300nm;stat.error
TOT_FLUXERR_FUV	microJy	Error on total FUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.100-200nm;stat.error
SPLIT_MAG_NUV	mag	Redistributed NUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.200-300nm
SPLIT_MAG_FUV	mag	Redistributed FUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.100-200nm
SPLIT_MAGERR_NUV	mag	Error on redistributed NUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.200-300nm;stat.error
SPLIT_MAGERR_FUV	mag	Error on redistributed FUV AB magnitude of all GALEX objects associated with GAMA object	phot.mag;em.UV.100-200nm;stat.error
SPLIT_FLUX_NUV	microJy	Redistributed NUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.200-300nm
SPLIT_FLUX_FUV	microJy	Redistributed FUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.100-200nm
SPLIT_FLUXERR_NUV	microJy	Error on redistributed NUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.200-300nm;stat.error
SPLIT_FLUXERR_FUV	microJy	Error on redistributed FUV flux of all GALEX objects associated with GAMA object	phot.flux;em.UV.100-200nm;stat.error
RA	deg	Right Ascension of GAMA object (J2000)	pos.eq.ra
OBJID	-	SDSS objid	meta.id
NUVFLAG	-	Combination of the NUV artifact flags of all GALEX objects involved in advanced matching procedure	meta.code;em.UV.200-300nm
NN_SFLAGS_NUV	-	NUV Sextraxtor extraction flags of nearest neighbour GALEX object	meta.code;em.UV.200-300nm
NN_SFLAGS_FUV	-	FUV Sextraxtor extraction flags of nearest neighbour GALEX object	meta.code;em.UV.100-200nm
NN_SEMIMINOR_NUV	arcsec	NUV semiminor axis of nearest neighbour GALEX object	phys.size.radius;em.UV.200-300nm
NN_SEMIMINORERR_NUV	arcsec	NUV semiminor axis error of nearest neighbour GALEX object	phys.size.radius;stat.error
NN_SEMIMAJOR_NUV	arcsec	NUV semimajor axis of nearest neighbour GALEX object	phys.size.radius;em.UV.200-300nm
NN_SEMIMAJORERR_NUV	arcsec	NUV semimajor axis error of nearest neighbour GALEX object	phys.size.radius;stat.error
NN_RA_GALEX	deg	Right Ascension of nearest neighbour GALEX object (J2000)	pos.eq.ra
NN_POSANG_NUV	deg	NUV position angle (east of north) of nearest neighbour GALEX object	pos.posAng
NN_POSANGERR_NUV	deg	NUV position angle error of nearest neighbour GALEX object	pos.posAng;stat.error
NN_NMATCH4	-	Number of GALEX objects found within 4 arcsec of GAMA object	meta.number
NN_MANY2ONE	-	Number of GAMA objects the nearest neighbour GALEX object is matched to	meta.number
NN_MAG_NUV	mag	NUV AB Kron magnitude of nearest neighbour GALEX object	phot.mag;em.UV.200-300nm
NN_MAG_FUV	mag	FUV AB Kron magnitude of nearest neighbour GALEX object using NUV aperture	phot.mag;em.UV.100-200nm
NN_MAGERR_NUV	mag	NUV AB Kron magnitude error of nearest neighbour GALEX object	phot.mag;em.UV.200-300nm;stat.error
NN_MAGERR_FUV	mag	FUV AB Kron magnitude error of nearest neighbour GALEX object using NUV aperture	phot.mag;em.UV.100-200nm;stat.error
NN_GGOID	-	Global Object ID of nearest neighbour GALEX object	meta.id
NN_FLUX_NUV	microJy	NUV flux of nearest neighbour GALEX object	phot.flux;em.UV.200-300nm
NN_FLUX_FUV	microJy	FUV flux of nearest neighbour GALEX object using NUV aperture	phot.flux;em.UV.100-200nm
NN_FLUXERR_NUV	microJy	NUV flux error of nearest neighbour GALEX object	phot.flux;em.UV.200-300nm;stat.error
NN_FLUXERR_FUV	microJy	FUV flux error of nearest neighbour GALEX object using NUV aperture	phot.flux;em.UV.100-200nm;stat.error
NN_FLUX50_RADIUS_NUV	arcsec	NUV 50 percent fraction-of-light radius of nearest neighbour GALEX object	phys.size.radius;em.UV.200-300nm
NN_FLUX50_RADIUS_FUV	arcsec	FUV 50 percent fraction-of-light radius of nearest neighbour GALEX object	phys.size.radius;em.UV.100-200nm
NN_DIST	arcsec	Distance between GAMA object and nearest neighbour GALEX object	pos.angDistance
NN_DEC_GALEX	deg	Declination of nearest neighbour GALEX object (J2000)	pos.eq.dec
NN_ARTIFACT_NUV	-	NUV artifact flag of nearest neighbour GALEX object (see GalexPhot notes)	meta.code;em.UV.200-300nm
NN_ARTIFACT_FUV	-	FUV artifact flag of nearest neighbour GALEX object (see GalexPhot notes)	meta.code;em.UV.100-200nm
NMATCHUV	-	Number of GALEX objects involved in advanced matching procedure	meta.number
NMATCHOPT	-	Number of GAMA objects involved in advanced matching procedure	meta.number
FUVFLAG	-	Combination of the FUV artifact flags of all GALEX objects involved in advanced matching procedure	meta.code;em.UV.100-200nm
EFF_EXPTIME_NUV	s	NUV effective exposure time (relative response)	obs.exposure;em.UV.200-300nm
EFF_EXPTIME_FUV	s	FUV effective exposure time (relative response)	obs.exposure;em.UV.100-200nm
DEC	deg	Declination of GAMA object (J2000)	pos.eq.dec
COG_RE_CRIT_NUV	arcsec	CoG NUV integration radius (multiple of 3 arcsec)	phys.size.radius;em.UV.200-300nm
COG_RE_CRIT_FUV	arcsec	CoG FUV integration radius (multiple of 3 arcsec)	phys.size.radius;em.UV.100-200nm
COG_MAG_NUV	mag	CoG NUV magnitude	phot.mag;em.UV.200-300nm
COG_MAG_FUV	mag	CoG FUV magnitude	phot.mag;em.UV.100-200nm
COG_MAGERR_NUV	mag	CoG NUV magnitude error	phot.mag;em.UV.200-300nm;stat.error
COG_MAGERR_FUV	mag	CoG FUV magnitude error	phot.mag;em.UV.100-200nm;stat.error
COG_HP_RAD_NUV	arcsec	CoG NUV radius enclosing 50% of the total flux	phys.size.radius;em.UV.200-300nm
COG_HP_RAD_FUV	arcsec	CoG FUV radius enclosing 50% of the total flux	phys.size.radius;em.UV.100-200nm
COG_FLUX_NUV	microJy	CoG NUV flux at the position of the GAMA object	phot.flux;em.UV.200-300nm
COG_FLUX_FUV	microJy	CoG FUV flux at the position of the GAMA object	phot.flux;em.UV.100-200nm
COG_FLUXERR_NUV	microJy	CoG NUV flux error	phot.flux;em.UV.200-300nm;stat.error
COG_FLUXERR_FUV	microJy	CoG FUV flux error	phot.flux;em.UV.100-200nm;stat.error
COG_CONFSOURCE_NUV	-	CoG NUV flag indicating whether masking occurred	meta.code
COG_CONFSOURCE_FUV	-	CoG FUV flag indicating whether masking occurred	meta.code
CATAID	-	Unique ID of GAMA object	meta.id
BEST_METHOD	-	Method used for the best flux estimates (AdvancedMatch or CoG)	meta.code
BEST_MAG_NUV	mag	Best estimate of the GAMA object`s NUV magnitude	phot.mag;em.UV.200-300nm
BEST_MAG_FUV	mag	Best estimate of the GAMA object`s FUV magnitude	phot.mag;em.UV.100-200nm
BEST_MAGERR_NUV	mag	Best estimate NUV magnitude error	phot.mag;em.UV.200-300nm;stat.error
BEST_MAGERR_FUV	mag	Best estimate FUV magnitude error	phot.mag;em.UV.100-200nm;stat.error
BEST_FLUX_NUV	microJy	Best estimate of the GAMA object`s NUV flux	phot.flux;em.UV.200-300nm