J/MNRAS/387/1323ivo://CDS.VizieR/J/MNRAS/387/1323doi:10.26093/cds/vizier.73871323CDSRoss N.P.Shanks T.Cannon R.D.Wake D.A.Sharp R.G.Croom S.M.,Peacock J.A.2024-07-06T20:16:19Z2009-01-31T10:44:03ZCDS support team

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

cds-question@unistra.frsurveysgalaxiesphotometryvisible-astronomysloan-photometryWe report on the AAT-AAOmega LRG Pilot observing run to establish the feasibility of a large spectroscopic survey using the new AAOmega instrument. We have selected luminous red galaxies (LRGs) using single epoch SDSS riz-photometry to i<20.5 and z<20.2. We have observed in three fields including the COSMOS field and the COMBO-17 S11 field, obtaining a sample of ~600 redshift z>~0.5 LRGs. Exposure times varied from 14h to determine the minimum exposure for AAOmega to make an essentially complete LRG redshift survey in average conditions. We show that LRG redshifts to i<20.5 can be measured in >>1.5h exposures and present comparisons with 2SLAQ and COMBO-17 (photo)redshifts. Crucially, the riz selection coupled with the three to four times improved AAOmega throughput is shown to extend the LRG mean redshift from z=0.55 for 2SLAQ to z=0.681+/-0.005 for riz-selected LRGs. This extended range is vital for maximizing the signal-to-noise ratio for the detection of the baryon acoustic oscillations (BAOs). Furthermore, we show that the amplitude of LRG clustering is s_0_=9.9+/-0.7h^-1^Mpc, as high as that seen in the 2SLAQ LRG Survey. Consistent results for this clustering amplitude are found from the projected and semi-projected correlation functions. This high amplitude is consistent with a long-lived population whose bias evolves as predicted by a simple 'high-peak' model. We conclude that a redshift survey of 360000 LRGs over 3000deg^2^, with an effective volume some four times bigger than previously used to detect BAO with LRGs, is possible with AAOmega in 170 nights.2008MNRAS.387.1323Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/387/1323CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/354/L25 : MgII absorbers in SDSS QSOs (Bouche+, 2004)J/MNRAS/372/425 : 2dF-SDSS Luminous Red Galaxy Survey, 2SLAQ (Cannon+, 2006)J/MNRAS/375/68 : MegaZ-LRG catalogue (Collister+, 2007)J/MNRAS/377/787 : SDSS Luminous Red Galaxies (Barber+, 2007)J/MNRAS/381/211 : Radio galaxies in the 2SLAQ LRG Survey (Sadler+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/387/1323https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/387/1323http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/387/1323https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/387/1323https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/387/1323http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/387/1323GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/387/1323/tablea1 (The AAOmega LRG Pilot Catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/387/1323/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/387/1323/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/387/1323/tablea1?GETtext/xml+votable180.050000true149.078352.273120.0055555555555555565/6549 6737 6814 6/26193 26195 26201 26204-26205 26956-26957 26960 26962 26968 27245 27247 27344-273452.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/387/1323?format=asciiOpticaldefaultJ/MNRAS/387/1323/tablea1The AAOmega LRG Pilot CataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS Object Designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharrmagfr-band SDSS Fibre magnitudemagphot.mag;em.opt.RfloatT[1/4] Model galaxy template to fit observed spectra (1)meta.id;stat.fitintXcorCross-correlation coefficient between the model and observed galaxy spectrastat.correlationfloatzMeasured redshiftsrc.redshiftfloatq_z[0/5] Redshift quality flag (2)meta.code.qual;src.redshiftintFieldField Name (cos, d05 or s11) (3)obs.fieldcharumagSDSS u-band Model magnitudemagphot.mag;em.opt.Ufloate_umagError in u-band Model magnitudemagstat.error;phot.mag;em.opt.UfloatgmagSDSS g-band Model magnitudemagphot.mag;em.opt.Bfloate_gmagError in g-band Model magnitudemagstat.error;phot.mag;em.opt.BfloatrmagSDSS r-band Model magnitudemagphot.mag;em.opt.Rfloate_rmagError in r-band Model magnitudemagstat.error;phot.mag;em.opt.RfloatimagSDSS i-band Model magnitudemagphot.mag;em.opt.Ifloate_imagError in i-band Model magnitudemagstat.error;phot.mag;em.opt.IfloatzmagSDSS z-band Model magnitudemagphot.mag;em.opt.Ifloate_zmagError in z-band Model magnitudemagstat.error;phot.mag;em.opt.IfloatRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.main