J/MNRAS/372/425ivo://CDS.VizieR/J/MNRAS/372/425doi:10.26093/cds/vizier.73720425CDSCannon R.Drinkwater M.Edge A.Eisenstein D.Nichol R.Outram P.,Pimbblet K.De Propris R.Roseboom I.Wake D.Allen P.,Bland-Hawthorn J.Bridges T.Carson D.Chiu K.Colless M.Couch W.,Croom S.Driver S.Fine S.Hewett P.Loveday J.Ross N.Sadler E.M.,Shanks T.Sharp R.Smith J.A.Stoughton C.Weilbacher P.Brunner R.J.,Meiksin A.Schneider D.P.2024-07-03T20:14:32Z2007-07-28T21:02:52ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frsurveysgalaxiesphotometryWe present a spectroscopic survey of almost 15000 candidate intermediate-redshift luminous red galaxies (LRGs) brighter than i=19.8, observed with 2dF on the Anglo-Australian Telescope. The targets were selected photometrically from the Sloan Digital Sky Survey (SDSS) and lie along two narrow equatorial strips covering 180deg^2^. Reliable redshifts were obtained for 92 per cent of the targets and the selection is very efficient: over 90 per cent have 0.45<z<0.8. More than 80 per cent of the ~11000 red galaxies have pure absorption-line spectra consistent with a passively evolving old stellar population. The redshift, photometric and spatial distributions of the LRGs are described. The 2SLAQ data will be released publicly from mid-2006, providing a powerful resource for observational cosmology and the study of galaxy evolution.2006MNRAS.372..425Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/372/425CatalogResearchIsServedByTAP VizieR generic serviceIsPreviousVersionOfJ/MNRAS/392/19IsServedByConesearch servicerelated-toVII/226 : The 2dF Galaxy Redshift Survey 100k Data Release (2dFGRS Team, 2001)VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)http://www.sdss.org : SDSS Home PageJ/MNRAS/377/787 : SDSS Luminous Red Galaxies (Barber+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/372/425https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/372/425http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/372/425https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/372/425https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/372/425http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/372/425GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/372/425/catalog (The 2SLAQ redshift catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/372/425/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/372/425/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/372/425/catalog?GETtext/xml+votable180.050000true8.651125-0.236250.0055555555555555565/4441-4442 4505-4506 4517 4698 4709-4710 4762 4773-4774 5466 6485-6486 6501-6502 6505-6506 6549-6550 6554 6565-6566 6757-6758 6761-6762 6805-6806 6809 6822 6825 7509 7849-7850 6/8192-8194 12288 12290 17725-17727 17761-17763 17772-17774 17812-17813 17856 17979 17981-17983 17995 17998-17999 18017-18019 18028 18030 18065 18067 18076 18112-18114 18749-18751 18785-18788 18790 18796 18798 18829-18831 18833-18835 18844 18846 18852-18853 18864 18880-18882 19005-19007 19042-19043 19085-19087 19089-19091 19100-19102 19108-19109 19111 19114 19120-19121 19136 19138 21821-21823 21909 21952-21954 25853-25855 25917-25919 25933-25935 25937-25939 25948-25949 25956-25957 25959 25962 25968 25970 25997-25999 26001-26003 26012 26014 26017-26019 26028-26030 26032-26034 26048 26173-26175 26183 26189 26191 26193-26195 26204 26206 26224 26253-26255 26257-26259 26268-26270 26277 26288-26290 26304-26305 26368-26370 26877-26879 26939 26942 27019 27021-27023 27025-27027 27036-27038 27041-27043 27052-27054 27056-27058 27213-27215 27217-27219 27228-27229 27233 27248-27250 27277-27279 27282-27283 27286 27292 27294 27297-27299 27304-27305 27308 27310 27312-27314 27392-27394 31374 31393-31395 31404 31406 45053-45055 49150-491512.762881831355591e-19 3.802535674660509e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/372/425?format=asciiOpticaldefaultJ/MNRAS/372/425/catalogThe 2SLAQ redshift catalogueDate6-character identifier for the 2dF data set from which the spectrum was taken "DDMMYY" (8)time.epochcharCCD[2] Identifier of CCD and 2dF spectrograph. Always 2 for LRGs (spectrograph 1 was used for the QSOs)meta.idint2dF[0/1] Field plate identifierobs.fieldintXposX position of object within 2dF field, in microns from the centre of the plate (9)umpos.cartesian.x;obs.fieldintYposY position of object within 2dF field, in microns from the centre of the plate (9)umpos.cartesian.y;obs.fieldintS/NAverage signal-to-noise ratio of spectrum (10)stat.snr;stat.meanfloatxpmag? Magnitude derived from spectrum (11)magphot.mag;em.opt.RfloatnullableVmag? Spectral magnitude from counts over range 515-595nm, approximately the V photometric band (starting at 523nm for March 2003 data).magphot.mag;em.opt.Vfloatnullablermag? Spectral magnitude over range 595-680nm, i.e. ~ r-band.magphot.mag;em.opt.RfloatnullablePryPriority flag (13)meta.codeinti(dev)SDSS extinction-corrected i-band 'de Vaucouleurs' magnitude (14)magphot.mag;em.opt.Ifloatg-rSDSS reddening-corrected (g-r) 'ModelMag' colour index (14)magphot.color;em.opt.B;em.opt.RfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2SLAQObject name, (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRmagExpected r-band fibre magnitude (1)magphot.mag;em.opt.RfloattSpTemplate spectrum used for best cross-correlation redshift (2)meta.codeintxcorCross-correlation (rx) parameter (3)stat.snrfloatzabsAbsorption line redshift from best cross-correlationsrc.redshiftfloatq_zabsQuality of auto redshift assessed by Zcode, after checking for emission lines (4)meta.code.qualintq_xcor[0/4] Quality of automatic xcorr redshift, as estimated by Zcode. (4 is best, 0 is useless)meta.code.qualintzRedshift finally adopted (= zabs unless manually modified)src.redshiftfloatq_zRedshift quality adopted (= q_zabs unless manually modified by observer) (5)meta.code.qual;src.redshiftintf_z[0/3] A flag indicating manual intervention (6)meta.codeintField2dF field number. Format LNN, where L is a letter a-e for northern (Galactic) fields and L=s for the southern stripmeta.id;obs.fieldcharFiber2dF fibre number (7)meta.noteintr-iSDSS reddening-corrected (r-i) 'ModelMag' colour index (14)magphot.color;em.opt.R;em.opt.IfloatArSDSS absorption in the r-band (14)magphys.absorptionfloatPryO? Original 2SLAQ priority numbermeta.codeintnullableNameOriOriginal 2SLAQ 18-character object name used in 2003, blank for later data (15)meta.idcharComComments. Mostly copied from Zcode output. Most often blankmeta.notecharSDSSdataDisplay the SDSS data for this galaxymeta.ref.urlchar