J/ApJ/877/81ivo://CDS.VizieR/J/ApJ/877/81doi:10.26093/cds/vizier.18770081CDSMasters D.C.Stern D.K.Cohen J.G.Capak P.L.Stanford S.A.,Hernitschek N.Galametz A.Davidzon I.Rhodes J.D.Sanders D.,Mobasher B.Castander F.Pruett K.Fotopoulou S.2022-04-04T09:04:25Z2020-12-17T09:03:00ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyredshiftedsurveysinfrared-photometryvisible-astronomyphotometryThe Complete Calibration of the Color-Redshift Relation (C3R2) survey is a multi-institution, multi-instrument survey that aims to map the empirical relation of galaxy color to redshift to i~24.5 (AB), thereby providing a firm foundation for weak lensing cosmology with the Stage IV dark energy missions Euclid and WFIRST. Here we present 3171 new spectroscopic redshifts obtained in the 2016B and 2017A semesters with a combination of DEIMOS, LRIS, and MOSFIRE on the Keck telescopes. The observations come from all of the Keck partners: Caltech, NASA, the University of Hawaii, and the University of California. Combined with the 1283 redshifts published in DR1, the C3R2 survey has now obtained and published 4454 high-quality galaxy redshifts. We discuss updates to the survey design and provide a catalog of photometric and spectroscopic data. Initial tests of the calibration method performance are given, indicating that the sample, once completed and combined with extensive data collected by other spectroscopic surveys, should allow us to meet the cosmology requirements for Euclid, and make significant headway toward solving the problem for WFIRST. We use the full spectroscopic sample to demonstrate that galaxy brightness is weakly correlated with redshift once a galaxy is localized in the Euclid or WFIRST color space, with potentially important implications for the spectroscopy needed to calibrate redshifts for faint WFIRST and LSST sources.2019ApJ...877...81Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/877/81CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)II/286 : VIRMOS deep imaging survey. VVDS-F02 catalog (VIRMOS team+, 2008)III/334 : VISTA Deep Extragalactic Observations (VIDEO) (Jarvis+, 2013)II/347 : KiDS-ESO-DR3 multi-band source catalog (de Jong+, 2017)J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)J/ApJ/690/1236 : COSMOS photometric redshift catalog (Ilbert+, 2009)J/A+A/544/A156 : UltraVISTA Catalogue Release DR1 (McCracken+, 2012)J/ApJS/203/24 : Structural param. of galaxies in CANDELS (van der Wel+, 2012)J/ApJS/206/10 : CANDELS multiwavelength catalog (Galametz+, 2013)J/ApJ/795/165 : Line ratios in z~2-3 gal. from KBSS-MOSFIRE (Steidel+, 2014)J/ApJ/801/97 : GOODS-S & UDS stellar mass cat. from CANDELS (Santini+, 2015)J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)J/ApJ/841/111 : C3R2 survey: high-confidence z from DR1 (Masters+, 2017)http://sites.google.com/view/c3r2-survey/home : C3R2 survey home pagehttp://koa.ipac.caltech.edu/Datasets/C3R2/ : C3R2 datasets on Keckhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/877/81https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/877/81http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/877/81https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/877/81https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/877/81http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/877/81GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/877/81/table6 (Redshift results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/877/81/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/877/81/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/877/81/table6?GETtext/xml+votable180.050000true34.37770833-5.256777780.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJ/877/815/6814 6/11424-11425 11427 17679 17683 17686 17689-17690 17692 27245 27247 273442.4270961532559724e-19 2.8962881395294825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/877/81?format=asciiOpticalInfrareddefaultJ/ApJ/877/81/table6Redshift resultsSimbadNameSimbad column added by the CDSmeta.idcharnullableSp1Interactive spectrum plotmeta.ref.urlcharfitsDownload the FITS filemeta.ref.urlcharFileName1D spectra file name in subdirectory sp (3)meta.id;meta.filecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField (COSMOS, VVDS, EGS, UDS or "serendip") (1)meta.id;obs.fieldcharID? Identifier within field (none for "serendip" sources)meta.id;meta.mainintnullableRAJ2000[2/14] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainMaskMask nameinstr.setupcharSlit[0/125] Slit number on maskmeta.noteintimag[16.39/25.3]? CFHT/MegaCam i-band AB magnitudemagphot.mag;em.opt.Ifloatnullablezspec[0/4.51] Measured spectroscopic redshiftsrc.redshiftfloatQual[3/4] Redshift quality flag (4=certain) (2)meta.code.qual;src.redshiftfloatInstKeck spectrograph (DEIMOS, LRIS or MOSFIRE)meta.id;instrcharfits2Download the FITS filemeta.ref.urlcharFileName21D spectra file name in subdirectory sp (3)meta.id;meta.filecharSp2Interactive spectrum plotmeta.ref.urlcharFCatDisplay the VVDS-F02 data (II/286), CANDELS multiwavelength data (Galametz+, 2013, J/ApJS/206/10) and COSMOS zphot data (Ilbert+, 2009, J/ApJ/690/1236) within 0.3"meta.ref.urlintnullableDR1Display data from DR1 (Masters+, 2017, J/ApJ/841/111)meta.ref.urlintnullable