J/ApJ/841/111ivo://CDS.VizieR/J/ApJ/841/111doi:10.26093/cds/vizier.18410111CDSMasters D.C.Stern D.K.Cohen J.G.Capak P.L.Rhodes J.D.,Castander F.J.Paltani S.2022-12-09T09:18:19Z2018-03-02T07:39:36ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsspectroscopyredshiftedA key goal of the Stage IV dark energy experiments Euclid, LSST, and WFIRST is to measure the growth of structure with cosmic time from weak lensing analysis over large regions of the sky. Weak lensing cosmology will be challenging: in addition to highly accurate galaxy shape measurements, statistically robust and accurate photometric redshift (photo-z) estimates for billions of faint galaxies will be needed in order to reconstruct the three-dimensional matter distribution. Here we present an overview of and initial results from the Complete Calibration of the Color-Redshift Relation (C3R2) survey, which is designed specifically to calibrate the empirical galaxy color-redshift relation to the Euclid depth. These redshifts will also be important for the calibrations of LSST and WFIRST. The C3R2 survey is obtaining multiplexed observations with Keck (DEIMOS, LRIS, and MOSFIRE), the Gran Telescopio Canarias (GTC; OSIRIS), and the Very Large Telescope (VLT; FORS2 and KMOS) of a targeted sample of galaxies that are most important for the redshift calibration. We focus spectroscopic efforts on undersampled regions of galaxy color space identified in previous work in order to minimize the number of spectroscopic redshifts needed to map the color-redshift relation to the required accuracy. We present the C3R2 survey strategy and initial results, including the 1283 high-confidence redshifts obtained in the 2016A semester and released as Data Release 1.2017ApJ...841..111Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/841/111CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)VII/265 : COSMOS Morphological Catalog (V1.1) (Tasca+ 2009)II/317 : The CFHTLS Survey (T0007 release) (Hudelot+ 2012)J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)J/ApJS/172/383 : AGN candidates in the COSMOS field (Trump+, 2007)J/ApJ/690/1236 : COSMOS photometric redshift catalog (Ilbert+, 2009)J/ApJ/709/572 : COSMOS 70um sources (Kartaltepe+, 2010)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/769/80 : Spitzer/IRAC observations of five deep fields (Ashby+, 2013)J/ApJS/212/18 : An atlas of UV-to-MIR galaxy SEDs (Brown+, 2014)J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)J/ApJ/795/165 : Line ratios in z~2-3 gal. from KBSS-MOSFIRE (Steidel+, 2014)J/ApJ/801/97 : GOODS-S+UDS stellar masses from CANDELS (Santini+, 2015)J/ApJ/830/51 : FourStar galaxy evolution survey (ZFOURGE) (Straatman+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/841/111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/841/111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/841/111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/841/111https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/841/111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/841/111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/841/111/table3 (Keck spectroscopic results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/841/111/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/841/111/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/841/111/table3?GETtext/xml+votable180.050000true34.37770833-5.256777780.0055555555555555566/11424-11425 17679 17690 27245 27247 27256 27258-27259https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/841/111?format=asciidefaultJ/ApJ/841/111/table3Keck spectroscopic resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifier ("COSMOS", "EGS" or "UDS")meta.id;obs.fieldcharID[539/1709617]? Identifier within Field (1)meta.id;meta.mainintnullableRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainMaskMask nameinstr.setupcharSlit[000/106] Slit numbermeta.noteintf_Slit[s] s: serendipitous sourcemeta.codecharimag[17.8/25.2]? i-band AB magnitudemagphot.mag;em.opt.Ifloatnullablezspec[0/3.8] Measured spectroscopic redshiftsrc.redshiftfloatQual[3/4] Redshift quality flag (2)meta.code.qual;src.redshiftfloatCANDELSDisplay CANDELS data from Galametz+, 2013, J/ApJS/206/10; Santini+, 2015, J/ApJ/801/97 and van der Wel+, 2012, J/ApJS/203/24 within 0.3"meta.ref.urlintnullableI09Display COSMOS data from Ilbert+, 2009, J/ApJ/690/1236 within 0.3"meta.ref.urlintnullableA13Display Spitzer data from Ashby+, 2013, J/ApJ/769/80 within 0.3"meta.ref.urlintnullableCOSMOSDisplay the COSMOS multiwavelength photometry catalog (II/284) within 0.3"meta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharnullable