J/ApJ/690/1236ivo://CDS.VizieR/J/ApJ/690/1236doi:10.26093/cds/vizier.16901236CDSIlbert O.Capak P.Salvato M.Aussel H.McCracken H.J.Sanders D.B.,Scoville N.Kartaltepe J.Arnouts S.Le Floc'h E.Mobasher B.,Taniguchi Y.Lamareille F.Leauthaud A.Sasaki S.Thompson D.,Zamojski M.Zamorani G.Bardelli S.Bolzonella M.Bongiorno A.,Brusa M.Caputi K.I.Carollo C.M.Contini T.Cook R.Coppa G.,Cucciati O.De La Torre S.De Ravel L.Franzetti P.Garilli B.,Hasinger G.Iovino A.Kampczyk P.Kneib J.-P.Knobel C.Kovac K.,Le Borgne J.F.Le Brun V.Fevre O.L.Lilly S.Looper D.Maier C.,Mainieri V.Mellier Y.Mignoli M.Murayama T.Pello R.Peng Y.,Perez-Montero E.Renzini A.Ricciardelli E.Schiminovich D.,Scodeggio M.Shioya Y.Silverman J.Surace J.Tanaka M.Tasca L.,Tresse L.Vergani D.Zucca E.2017-04-24T07:37:52Z2017-03-17T12:41:57ZCDS support team

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

cds-question@unistra.frsurveysgalaxiescatalogsredshiftedphotometryWe present accurate photometric redshifts (photo-z) in the 2-deg^2^ COSMOS field. The redshifts are computed with 30 broad, intermediate, and narrowbands covering the UV (Galaxy Evolution Explorer), visible near-IR (NIR; Subaru, Canada-France-Hawaii Telescope (CFHT), United Kingdom Infrared Telescope, and National Optical Astronomy Observatory), and mid-IR (Spitzer/IRAC). A {chi}^2^ template-fitting method (Le Phare) was used and calibrated with large spectroscopic samples from the Very Large Telescope Visible Multi-Object Spectrograph and the Keck Deep Extragalactic Imaging Multi-Object Spectrograph. We develop and implement a new method which accounts for the contributions from emission lines ([OII], H{beta}, H{alpha}, and Ly{alpha}) to the spectral energy distributions (SEDs). The treatment of emission lines improves the photo-z accuracy by a factor of 2.5. Comparison of the derived photo-z with 4148 spectroscopic redshifts (i.e., {Delta}z=zs-zp) indicates a dispersion of {sigma}_{Delta}z/(1+zs)_=0.007 at i^+^_AB_<22.5, a factor of 2-6 times more accurate than earlier photo-z in the COSMOS, CFHT Legacy Survey, and the Classifying Object by Medium-Band Observations-17 survey fields. At fainter magnitudes i^+^_AB_<24 and z<1.25, the accuracy is {sigma}_{Delta}z/(1+zs)_=0.012. The deep NIR and Infrared Array Camera coverage enables the photo-z to be extended to z~2, albeit with a lower accuracy ({sigma}_{Delta}z/(1+zs)_=0.006 at i^+^_AB_~24). The redshift distribution of large magnitude-selected samples is derived and the median redshift is found to range from z_m_= 0.66 at 22 <i^+^_AB_<22.5 to z_m_=1.06 at 24.5<i^+^_AB_<25. At i ^+^_AB_<26.0, the multiwavelength COSMOS catalog includes approximately 607,617 objects. The COSMOS-30 photo-z enables the full exploitation of this survey for studies of galaxy and large-scale structure evolution at high redshift.2009ApJ...690.1236Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/690/1236CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)VII/265 : COSMOS Morphological Catalog (V1.1) (Tasca+ 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/690/1236https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/690/1236http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/690/1236https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/690/1236https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/690/1236http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/690/1236GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/690/1236/cosmoszp (COSMOS photometric redshift catalog, Version 1.5, April, 05 2008 - Magnitude-limited (I<25))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/690/1236/cosmoszp?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/690/1236/cosmoszp?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/690/1236/cosmoszp?GETtext/xml+votable180.050000true150.776021.624673060.0055555555555555565/6814 6/27245 27247 273442.367228618189496e-19 5.21690004175582e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/690/1236?format=asciiOpticaldefaultJ/ApJ/690/1236/cosmoszpCOSMOS photometric redshift catalog, Version 1.5, April, 05 2008 - Magnitude-limited (I<25)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[26310/1993775] Name (Id)meta.id;meta.mainintTile[13/117] Tile (tile)meta.idintRAJ2000Right ascension (J2000) (alpha)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) (delta)degpos.eq.dec;meta.mainindexedzpbest? Best photometric redshift (zp_best) (1)src.redshift.photdoublenullablezpType[0/2]? Redshift type (type) (2)meta.codeintnullablezpgal[0/6]? Photo-z measured using the galaxy templates (zp_gal) (3)src.redshift.photdoublenullablel68zpgal? Lower limit, 68% confidence level on zpgal (zl68_gal)src.redshift.photdoublenullableu68zpgql? Upper limit, 68% confidence level on zpgal (zu68_gal)src.redshift.photdoublenullablel99zpgal? Lower limit, 99% confidence level on zpgal (zl99_gal)src.redshift.photdoublenullableu99zpgal? Upper limit, 99% confidence level on zpgal (zu99_gal)src.redshift.photdoublenullablechigal? Reduced chi2 (null if less than 3 filters) (chi_gal)stat.fit.chi2doublenullablemodgal[0/47]? Best fit template (mod_gal) (4)meta.id;stat.fitintnullableE(B-V)? additional extinction (ebv) (5)phot.color.excessdoublenullablezpsec[0/6]? Second photo-z solution if a second peak is detected in the PDFz (null if not detected) (zp_sec)src.redshift.photdoublenullablechisec? Reduced chi2 for the second photo-z solution (use only if zpsec>0) (chi_sec)stat.fit.chi2doublenullablemodsec[0/47]? Template for the second photo-z solution (use only if zpsec>0) (mod_sec)meta.id;stat.fitintnullableE(B-V)sec? Additional extinction for the second photo-z solution (use only if zp_sec>0) (ebv_sec)phot.color.excessdoublenullablemodstar[-119/0]? Model for the star library (mod_star) (6)meta.id;stat.fitintnullablechistar? Reduced chi2 (chi_star)stat.fit.chi2doublenullableUmag? CFHT u* aperture magnitude (3" aperture) (Umag)magphot.mag;em.opt.Udoublenullablee_Umag? rms uncertainty on Umag (eU)magstat.error;phot.mag;em.opt.UdoublenullableBmag? Subaru B aperture magnitude (3" aperture) (Bmag)magphot.mag;em.opt.Bdoublenullablee_Bmag? rms uncertainty on Bmag (eB)magstat.error;phot.mag;em.opt.BdoublenullableVmag? Subaru V aperture magnitude (3" aperture) (Vmag)magphot.mag;em.opt.Vdoublenullablee_Vmag? rms uncertainty on Vmag (eV)magstat.error;phot.mag;em.opt.VdoublenullableGmag? Subaru g+ aperture magnitude (3" aperture) (Gmag)magphot.mag;em.opt.Bdoublenullablee_Gmag? rms uncertainty on Gmag (eG)magstat.error;phot.mag;em.opt.BdoublenullableRmag? Subaru r+ aperture magnitude (3" aperture) (Rmag)magphot.mag;em.opt.Rdoublenullablee_Rmag? rms uncertainty on Rmag (eI)magstat.error;phot.mag;em.opt.RdoublenullableImag? Subaru i+ aperture magnitude (3" aperture) (Imag)magphot.mag;em.opt.Idoublenullablee_Imag? rms uncertainty on Imag (eZ)magstat.error;phot.mag;em.opt.IdoublenullableZmag? Subaru z+ aperture magnitude (3" aperture) (Zmag)magphot.mag;em.opt.Idoublenullablee_Zmag? rms uncertainty on Xmag (eZ)magstat.error;phot.mag;em.opt.IdoublenullableICmag? CFHT i' aperture magnitude (3" aperture) (ICmag)magphot.mag;em.opt.Idoublenullablee_ICmag? rms uncertainty on ICmag (eIC)magstat.error;phot.magdoublenullableJmag? UKIRT J aperture magnitude (3" aperture) (Jmag)magphot.mag;em.IR.Jdoublenullablee_Jmag? rms uncertainty on Jmag (eJ)magstat.error;phot.mag;em.IR.JdoublenullableKmag? CFHT K aperture magnitude (3" aperture) (Kmag)magphot.mag;em.IR.Kdoublenullablee_Kmag? rms uncertainty on Kmag (eK)magstat.error;phot.mag;em.IR.Kdoublenullablef_Bmag[0/9] Photometric flag, mask in the B band, 0 good (flagB)meta.codeintf_Vmag[0/9] Photometric flag, mask in the V band, 0 good (flagV)meta.codeintf_Imag[0/9] Photometric flag, mask in the I band, 0 good (flagi)meta.codeintf_Zmag[0/9] Photometric flag, mask in the Z band, 0 good (flagz)meta.codeintf_D[0] Photometric flag, mask in the deep area, 0 good (flagD)meta.codeintNbFilt[0/34] Number of filters used in the photo-z fitting (NbFilt)meta.numberintimag? Auto magnitude in the i band (I_auto)magphot.mag;em.opt.Idoublenullableioffset? Offset to transform aperture magnitude into auto (auto_offset)magphot.mag;arith.zpdoublenullableq_ioffset[-1/2] Quality flag in the offsetmeta.code.qualintVMAGAbsolute magnitude in the V(Subaru) band (valid only for galaxies) (MV)magphys.magAbs;em.opt.Vdouble