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{
"url": "https://datacentral.org.au/api/schema/9/?format=api",
"name": "2dfgrs",
"pretty_name": "2dFGRS",
"title": "The 2dF Galaxy Redshift Survey",
"description": "<p>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).</p>",
"pi": "Matthew Colless",
"contact": {
"email": "matthew.colless@anu.edu.au",
"name": "Matthew Colless"
},
"website": "http://www.2dfgrs.net/",
"active": true,
"type": "Survey",
"data_releases": [
{
"name": "fdr",
"pretty_name": "Final Data Release",
"version": 1.0,
"data_release_number": 2,
"contact": {
"email": "matthew.colless@anu.edu.au",
"name": "Matthew Colless"
},
"created": "2020-08-06T01:34:30.185229Z",
"updated": "2020-12-14T02:45:13.084960Z",
"type": "DataRelease",
"catalogues": {
"groups": [
{
"id": 30,
"name": "Definitive",
"pretty_name": "Definitive",
"description": "All the available information",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": "1",
"type": "CatalogueGroup",
"created": "2020-08-10T01:21:30.990002Z",
"updated": "2020-12-09T02:23:24.821813Z",
"contact": {
"email": "matthew.colless@anu.edu.au",
"name": "Matthew Colless"
},
"tables": [
{
"id": 99,
"name": "spec_all",
"pretty_name": null,
"description": "All the spectroscopic information",
"documentation": "",
"file_path": "/data/ingestion_1.9/2dfgrs/fdr/catalogues/2dfgrs_spec_all.csv",
"file_name": "2dfgrs_spec_all.csv",
"file_extension": "csv",
"version": "1",
"type": "CatalogueTable",
"created": "2020-08-10T01:21:31.118142Z",
"updated": "2020-12-09T02:23:24.908842Z",
"contact": {
"email": "matthew.colless@anu.edu.au",
"name": "Matthew Colless"
},
"input_cat": false,
"columns": [
{
"id": 4636,
"name": "serial",
"pretty_name": null,
"description": "2dFGRS serial number",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.416859Z",
"updated": "2020-12-09T02:23:26.815542Z",
"contact": null,
"ucd": "meta.id",
"unit": "None"
},
{
"id": 4637,
"name": "name",
"pretty_name": null,
"description": "2dFGRS name",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.477171Z",
"updated": "2020-12-09T02:23:26.828603Z",
"contact": null,
"ucd": "meta.id;meta.main",
"unit": "None"
},
{
"id": 4638,
"name": "UKST",
"pretty_name": null,
"description": "UKST sky survey field number",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.503781Z",
"updated": "2020-12-09T02:23:26.841908Z",
"contact": null,
"ucd": "obs.field",
"unit": "None"
},
{
"id": 4639,
"name": "obsrun",
"pretty_name": null,
"description": "Observing run year and month",
"documentation": "",
"file_path": null,
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"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.561677Z",
"updated": "2020-12-09T02:23:26.854237Z",
"contact": null,
"ucd": "obs.param;obs",
"unit": "None"
},
{
"id": 4640,
"name": "TDFgg",
"pretty_name": null,
"description": "2dFGRS field number (+NGP,-SGP)",
"documentation": "",
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"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.596457Z",
"updated": "2020-12-09T02:23:26.868672Z",
"contact": null,
"ucd": "obs.field",
"unit": "None"
},
{
"id": 4641,
"name": "pivot",
"pretty_name": null,
"description": "2dF pivot",
"documentation": "",
"file_path": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.623696Z",
"updated": "2020-12-09T02:23:26.880487Z",
"contact": null,
"ucd": "obs.param",
"unit": "None"
},
{
"id": 4642,
"name": "plate",
"pretty_name": null,
"description": "2dF plate",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.667154Z",
"updated": "2020-12-09T02:23:26.892474Z",
"contact": null,
"ucd": "obs.param",
"unit": "None"
},
{
"id": 4643,
"name": "fiber",
"pretty_name": null,
"description": "2dF fiber",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.695501Z",
"updated": "2020-12-09T02:23:26.912827Z",
"contact": null,
"ucd": "obs.param",
"unit": "None"
},
{
"id": 4644,
"name": "z",
"pretty_name": null,
"description": "Observed redshift",
"documentation": "",
"file_path": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.723058Z",
"updated": "2020-12-09T02:23:26.925175Z",
"contact": null,
"ucd": "src.redshift",
"unit": "None"
},
{
"id": 4645,
"name": "z_helio",
"pretty_name": null,
"description": "Heliocentric redshift",
"documentation": "",
"file_path": null,
"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.750973Z",
"updated": "2020-12-09T02:23:26.945843Z",
"contact": null,
"ucd": "src.redshift;pos.heliocentric",
"unit": "None"
},
{
"id": 4646,
"name": "abemma",
"pretty_name": null,
"description": "Redshift type (abs=1,emi=2,man=3)",
"documentation": "",
"file_path": null,
"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.770693Z",
"updated": "2020-12-09T02:23:26.966433Z",
"contact": null,
"ucd": "meta.code;src.redshift",
"unit": "None"
},
{
"id": 4647,
"name": "quality",
"pretty_name": null,
"description": "Redshift quality parameter (quality=1-5; reliable redshifts have quality>=3)",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.818529Z",
"updated": "2020-12-09T02:23:26.979280Z",
"contact": null,
"ucd": "meta.code.qual;src.redshift",
"unit": "None"
},
{
"id": 4648,
"name": "best",
"pretty_name": null,
"description": "In extension 0, extension number with best spectrum; in extension>0, 1 if best spectrum and 0 otherwise",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.869525Z",
"updated": "2020-12-09T02:23:26.991743Z",
"contact": null,
"ucd": "meta.code",
"unit": "None"
},
{
"id": 4649,
"name": "spectra",
"pretty_name": null,
"description": "Number of spectra for this object",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.929425Z",
"updated": "2020-12-09T02:23:27.013046Z",
"contact": null,
"ucd": "meta.number",
"unit": "None"
},
{
"id": 4650,
"name": "extnum",
"pretty_name": null,
"description": "Extension number",
"documentation": "",
"file_path": null,
"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.973004Z",
"updated": "2020-12-09T02:23:27.025818Z",
"contact": null,
"ucd": "meta.code",
"unit": "None"
},
{
"id": 4651,
"name": "OBSNAME",
"pretty_name": null,
"description": "Observed object name",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.024917Z",
"updated": "2020-12-09T02:23:27.039541Z",
"contact": null,
"ucd": "meta.id",
"unit": "None"
},
{
"id": 4652,
"name": "OBSRA",
"pretty_name": null,
"description": "Observed RA",
"documentation": "",
"file_path": null,
"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.069440Z",
"updated": "2020-12-09T02:23:27.052783Z",
"contact": null,
"ucd": "pos.eq.ra",
"unit": "radians"
},
{
"id": 4653,
"name": "OBSDEC",
"pretty_name": null,
"description": "Observed Dec",
"documentation": "",
"file_path": null,
"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.129029Z",
"updated": "2020-12-09T02:23:27.074596Z",
"contact": null,
"ucd": "pos.eq.dec",
"unit": "radians"
},
{
"id": 4654,
"name": "MATCH_DR",
"pretty_name": null,
"description": "Position match dr in arcsec",
"documentation": "",
"file_path": null,
"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.164599Z",
"updated": "2020-12-09T02:23:27.104186Z",
"contact": null,
"ucd": "pos.angDistance",
"unit": "arcsec"
},
{
"id": 4655,
"name": "Z",
"pretty_name": null,
"description": "Raw measured redshift",
"documentation": "",
"file_path": null,
"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.203165Z",
"updated": "2020-12-09T02:23:27.118786Z",
"contact": null,
"ucd": "src.redshift",
"unit": "None"
},
{
"id": 4656,
"name": "Z_HELIO",
"pretty_name": null,
"description": "Heliocentric corrected redshift",
"documentation": "",
"file_path": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.241608Z",
"updated": "2020-12-09T02:23:27.148767Z",
"contact": null,
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},
{
"id": 4658,
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"description": "Redshift type (abs=1, emi=2, man=3)",
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"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.322942Z",
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"contact": null,
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},
{
"id": 4659,
"name": "NMBEST",
"pretty_name": null,
"description": "Number of emission lines for Z_EMI",
"documentation": "",
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.351171Z",
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"contact": null,
"ucd": "meta.number",
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},
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"id": 4660,
"name": "NGOOD",
"pretty_name": null,
"description": "Number of good emmision lines",
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"created": "2020-08-10T01:21:35.369952Z",
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},
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},
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"created": "2020-08-10T01:21:35.433729Z",
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},
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"description": "Cross-correlation template from best spectrum",
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"type": "CatalogueColumn",
"created": "2020-08-10T01:21:35.453200Z",
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},
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"description": "Cross-correlation peak",
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"created": "2020-08-10T01:21:35.488430Z",
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"created": "2020-08-10T01:21:35.542612Z",
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},
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},
{
"id": 4668,
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},
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},
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"id": 4670,
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},
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},
{
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"description": "2dF YYMMDD observed date; -99 if none",
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"created": "2020-08-10T01:21:35.981244Z",
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},
{
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"created": "2020-08-10T01:21:36.027285Z",
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"contact": null,
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"unit": "YYYY:MM:DD"
},
{
"id": 4678,
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"description": "2dF spectrograph ID",
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"created": "2020-08-10T01:21:36.087802Z",
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"id": 4750,
"name": "BJSEL",
"pretty_name": null,
"description": "Final bj magnitude with extinction correction",
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"version": null,
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"id": 4751,
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"description": "Original bj magnitude without extinction correction",
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"type": "CatalogueColumn",
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"id": 4752,
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"description": "Original bj magnitude with extinction correction",
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"file_name": null,
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:38.959034Z",
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"ucd": "phot.mag;em.opt.B",
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{
"id": 4753,
"name": "GALEXT",
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"description": "Galactic extinction value",
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"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:39.004603Z",
"updated": "2020-12-09T02:23:29.010017Z",
"contact": null,
"ucd": "phys.absorption",
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},
{
"id": 4754,
"name": "SB_BJ",
"pretty_name": null,
"description": "Supercosmos bj magnitude without extinction correction",
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"file_name": null,
"file_extension": null,
"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:39.063780Z",
"updated": "2020-12-09T02:23:29.023034Z",
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{
"id": 4755,
"name": "SR_R",
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"description": "Supercosmos R magnitude without extinction correction",
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"version": null,
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{
"id": 4756,
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"description": "FITS extension number of the best spectrum",
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"type": "CatalogueColumn",
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"contact": null,
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{
"id": 4757,
"name": "z",
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"description": "Best redshift (observed)",
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{
"id": 4758,
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"description": "Observation run of best spectrum",
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{
"id": 4759,
"name": "quality",
"pretty_name": null,
"description": "Redshift quality parameter (quality=1-5; reliable redshifts have quality>=3)",
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"created": "2020-08-10T01:21:39.269046Z",
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"id": 4612,
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"description": "k classification parameter = k / k_star",
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"file_name": null,
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"version": null,
"type": "CatalogueColumn",
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"id": 4613,
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"description": "mu classification parameter = mu / mu_star",
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"version": null,
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"id": 4619,
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"description": "Distortion corrected difference (x_bj - x_R)*100",
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"description": "Unmatched APM 'total' mag",
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"id": 4625,
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"description": "Unmatched raw APM profile integrated mag",
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"version": null,
"type": "CatalogueColumn",
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"description": "Unmatched raw APM 2\" profile integrated mag",
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"version": null,
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{
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"description": "Unmatched raw stellar mag (from APMCAL)",
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"id": 4631,
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"updated": "2020-12-09T02:23:26.715097Z",
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"id": 4632,
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"description": "Original bj magnitude without extinction correction (prior to re-calibration to BJG)",
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"ucd": "phot.mag;em.opt.B",
"unit": "mag"
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{
"id": 4633,
"name": "BJSELOLD",
"pretty_name": null,
"description": "Original bj magnitude with extinction correction (prior to re-calibration to BJSEL); used to select survey sample",
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"version": null,
"type": "CatalogueColumn",
"created": "2020-08-10T01:21:34.269665Z",
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"ucd": "phot.mag;em.opt.B",
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{
"id": 4634,
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"pretty_name": null,
"description": "100k release bj magnitude without extinction correction (prior to re-calibration to BJG)",
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"file_name": null,
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"version": null,
"type": "CatalogueColumn",
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"contact": null,
"ucd": "phot.mag;em.opt.B",
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"id": 4635,
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"description": "100k release bj magnitude with extinction correction (prior to re-calibration to BJSEL)",
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"file_path": null,
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"file_extension": null,
"version": null,
"type": "CatalogueColumn",
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"id": 4610,
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"description": "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)",
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]
}
]
},
{
"id": 32,
"name": "dc_generated",
"pretty_name": "Data Central Generated",
"description": "Additional tables created by Data Central",
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"version": "1",
"type": "CatalogueGroup",
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"name": "dc_source_list",
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"description": "Source list of all objects contained within 6dFGS",
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"file_path": "/data/ingestion_1.9/2dfgrs/fdr/catalogues/dc_source_list.csv",
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"version": null,
"type": "CatalogueColumn",
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"id": 4762,
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