J/ApJ/817/34ivo://CDS.VizieR/J/ApJ/817/34doi:10.26093/cds/vizier.18170034CDSMarchesi S.Civano F.Elvis M.Salvato M.Brusa M.Comastri A.,Gilli R.Hasinger G.Lanzuisi G.Miyaji T.Treister E.Urry C.M.,Vignali C.Zamorani G.Allevato V.Cappelluti N.Cardamone C.,Finoguenov A.Griffiths R.E.Karim A.Laigle C.LaMassa S.M.Jahnke K.,Ranalli P.Schawinski K.Schinnerer E.Silverman J.D.Smolcic V.,Suh H.Trakhtenbrot B.2022-10-25T07:02:41Z2019-01-31T14:39:29ZCDS support team

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

cds-question@unistra.frx-ray-sourcesinfrared-photometryastronomical-object-identificationvisible-astronomyredshiftedWe present the catalog of optical and infrared counterparts of the Chandra COSMOS-Legacy Survey, a 4.6Ms Chandra program on the 2.2deg^2^ of the COSMOS field, combination of 56 new overlapping observations obtained in Cycle 14 with the previous C-COSMOS survey. In this Paper we report the i, K, and 3.6{mu}m identifications of the 2273 X-ray point sources detected in the new Cycle 14 observations. We use the likelihood ratio technique to derive the association of optical/infrared (IR) counterparts for 97% of the X-ray sources. We also update the information for the 1743 sources detected in C-COSMOS, using new K and 3.6{mu}m information not available when the C-COSMOS analysis was performed. The final catalog contains 4016 X-ray sources, 97% of which have an optical/IR counterpart and a photometric redshift, while ~54% of the sources have a spectroscopic redshift. The full catalog, including spectroscopic and photometric redshifts and optical and X-ray properties described here in detail, is available online. We study several X-ray to optical (X/O) properties: with our large statistics we put better constraints on the X/O flux ratio locus, finding a shift toward faint optical magnitudes in both soft and hard X-ray band. We confirm the existence of a correlation between X/O and the the 2-10keV luminosity for Type 2 sources. We extend to low luminosities the analysis of the correlation between the fraction of obscured AGNs and the hard band luminosity, finding a different behavior between the optically and X-ray classified obscured fraction.2016ApJ...817...34Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/817/34CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)J/A+A/371/833 : ROSAT Ultra Deep Survey (Lehmann+, 2001)J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)J/A+A/393/425 : Spectral analysis of Lockman Hole (Mainieri+, 2002)J/A+A/409/79 : HELLAS2XMM survey. IV. (Fiore+, 2003)J/A+A/428/383 : XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004)J/A+A/432/69 : Extremely Red Objects XMM-Newton observations (Brusa+, 2005)J/A+A/466/31 : The HELLAS2XMM survey. VIII (Cocchia+, 2007)J/ApJS/172/29 : XMM-Newton survey in COSMOS field. I. (Hasinger+, 2007)J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)J/ApJS/172/46 : VLA-COSMOS survey. II. (Schinnerer+, 2007)J/ApJS/172/383 : AGN candidates in the COSMOS field (Trump+, 2007)J/ApJ/693/8 : High-redshift QSOs in the COSMOS survey (Brusa+, 2009)J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS (Cappelluti+, 2009)J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)J/ApJ/690/1236 : COSMOS photometric redshift catalog (Ilbert+, 2009)J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)J/ApJ/696/1195 : COSMOS AGN spectroscopic survey. I. (Trump+, 2009)J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)J/ApJ/709/572 : COSMOS 70um sources (Kartaltepe+, 2010)J/ApJS/187/560 : Photometric redshifts of the 2Ms CDF-S (Luo+, 2010)J/ApJ/708/137 : Broad-line AGNs in zCOSMOS survey (Merloni+, 2010)J/ApJ/725/480 : Stellar X-ray sources in the COSMOS survey (Wright+, 2010)J/ApJ/740/37 : Obscured AGN at z~0.5-1 in the CDFS (Luo+, 2011)J/A+A/535/A80 : Type-2 QSOs in XMM-COSMOS (Mainieri+, 2011)J/ApJ/742/61 : Phot. redshift of AGNs from XMM- and C-COSMOS (Salvato+ 2011)J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)J/MNRAS/427/3103 : COSMOS field supermassive black holes (Bongiorno+, 2012)J/ApJS/201/30 : The Chandra COSMOS survey. III. (Civano+, 2012)J/ApJ/759/6 : SEDs of type I AGN in COSMOS. I. XMM-COSMOS (Elvis+, 2012)J/A+A/542/A16 : X-ray detection of radio-selected SF galaxies (Ranalli+, 2012)J/MNRAS/436/3581 : X-ray observations of Stripe 82 (LaMassa+, 2013)J/MNRAS/443/1999 : X-ray spectral analysis of AGNs (Brightman+, 2014)J/ApJ/790/16 : X-ray ETGs in the Chandra COSMOS survey (Civano+, 2014)J/MNRAS/438/1288 : SEDs of type I AGN in XMM-COSMOS. II. (Hao+, 2014)J/ApJ/796/60 : ECDFS galaxies phot. redshifts & counterparts (Hsu+, 2014)J/AJ/148/137 : Merging galaxies in COSMOS to z~1 (Lackner+, 2014)J/ApJ/802/89 : Luminosity function of X-ray-selected AGNs (Buchner+, 2015)J/ApJ/808/185 : NuSTAR surveys: COSMOS catalog (Civano+, 2015)J/A+A/575/A40 : [OII] luminosity function (Comparat+, 2015)J/ApJ/807/129 : X-ray to MIR luminosities relation of AGNs (Stern, 2015)J/MNRAS/448/3167 : z>~5 AGN in Chandra Deep Field-South (Weigel+, 2015)J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)http://splash.caltech.edu/ : SPLASH (Spitzer Large Area Survey withhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/817/34https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/817/34http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/817/34https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/817/34https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/817/34http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/817/34GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/817/34/catalog (Chandra COSMOS Legacy optical-NIR counterparts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/817/34/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/817/34/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/817/34/catalog?GETtext/xml+votable180.050000true149.639561.991033890.005555555555555556Cone search capability for table J/ApJ/817/34/ccosmos (Chandra COSMOS (C-COSMOS) identification catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/817/34/ccosmos?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/817/34/ccosmos?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/817/34/ccosmos?GETtext/xml+votable180.050000true150.170462.21880.0055555555555555565/6814 6/27245 27247 273445.0053231178386525e-20 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/817/34?format=asciiX-rayOpticalInfrareddefaultJ/ApJ/817/34/catalogChandra COSMOS Legacy optical-NIR counterpartsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintF3.6um2[13.7/26.6]? 3.6um flux in 1.9" aperture from the SPLASH catalog (splash_mag)uJyphot.mag;em.IR.3-4umfloatnullablee_F3.6um2[0.01/1.7]? F3.6um2 error (splash_mag_err)uJystat.errorfloatnullablee_F3.6um[0.01/0.2]? F3.6um error (irac_mag_err)uJystat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharIDCID or LID NNNNNN (id_x) (1)meta.id;meta.maincharRAJ2000X-ray right ascension (J2000) (RA_x) (2)degpos.eq.ra;meta.mainDEJ2000X-ray declination (J2000) (DEC_x) (2)degpos.eq.dec;meta.mainDET_ML_F? Maximum likelihood detection value in 0.5-10keV (DET_ML_F ) (2)stat.likelihood;instr.saturationnullableDET_ML_S? Maximum likelihood detection value in 0.5-2keV (DET_ML_S ) (2)stat.likelihood;instr.saturationnullableDET_ML_H? Maximum likelihood detection value in 2-10keV (DET_ML_H ) (2)stat.likelihood;instr.saturationnullableF0.5-10keVX-ray flux in full band (0.5-10keV) (flux_F)(2)mW.m**-2phot.flux;em.X-raydoubleF0.5-2keVX-ray flux in soft band (0.5-2keV) (flux_S)(2)mW.m**-2phot.flux;em.X-raydoubleF2-10keVX-ray flux in hard band (2-10keV) (flux_H) (2)mW.m**-2phot.flux;em.X-raydoubleHR[-0.95/0.92]? Hardness ratio (HR ) (2)phot.flux;arith.ratiofloatnullableb_HR[-1/1]? Hardness ratio 90% lower limit (HR_lo_lim) (2)phot.flux;stat.minfloatnullableB_HR[-1/1]? Hardness ratio 90% upper limit (HR_up_lim) (2)phot.flux;stat.maxfloatnullable[ICS2009][10466/2031046]? Optical counterpart ID from Ilbert+ (2009, J/ApJ/690/1236) (id_i)meta.id.crossintnullableRAOdeg? Optical counterpart RA (J2000) (ra_i)degpos.eq.ranullableDEOdeg? Optical counterpart DEC (J2000) (dec_i)degpos.eq.decnullableimag[12.4/30.7]? i-band magnitude in 3" aperture from Ilbert+ (2009) (i_mag)magphot.mag;em.opt.Ifloatnullablee_imag? imag error (i_mag_err)magstat.error;phot.magfloatnullabler_imag? i-band magnitude origin: 1=Subaru, 2=CFHT, 3=SDSS, 5=manual photometry (flag_i_mag)meta.ref;pos.frameintnullableCOSMOS2015? K-band counterpart identifier from Laigle+ (2016, J/ApJS/224/24) (id_k_uv)meta.idintnullableRAKdeg? K-band counterpart RA (J2000) (ra_k_uv)degpos.eq.ranullableDEKdeg? K-band counterpart DE (J2000) (dec_k_uv)degpos.eq.decnullableKmag[12/29.6]? UltraVISTA K-band magnitude in 3" aperture from Laigle+ (k_uv_mag)magphot.mag;em.IR.Kfloatnullablee_Kmag[0.01/3.4]? Kmag error (k_uv_mag_err)magstat.error;phot.magfloatnullablecfht[0/1733715]? K-band counterpart ID from the Ilbert+ (2009) CFHT catalog (id_k_cfht)meta.idintnullableRACdeg? CFHT K-band counterpart right ascension (J2000) (ra_k_cfht)degpos.eq.ranullableDECdeg? CFHT K-band counterpart declination (J2000) (dec_k_cfht)degpos.eq.decnullableKmag2[13/26.6]? CFHT K-band magnitude in 3" aperture from Ilbert+ (2009) (k_cfht_mag)magphot.mag;em.IR.Kfloatnullablee_Kmag2[0.01/20.6]? Kmag2 error (k_cfht_mag_err)magstat.error;phot.magfloatnullableRAIdeg? IRAC 3.6um counterpart RA (J2000) from the Sanders catalog (ra_irac)degpos.eq.ranullableDEIdeg? IRAC 3.6um counterpart DEC (J2000) from the Sanders catalog (dec_irac)degpos.eq.decnullableF3.6um[13.5/24.2]? IRAC 3.6um flux in 1.9" aperture from the Sanders catalog (2007ApJS..172...86S) (irac_mag)uJyphot.mag;em.IR.3-4umfloatnullableRASdeg? 3.6um counterpart RA (J2000) from the SPLASH catalog (ra_splash)degpos.eq.ranullableDESdeg? 3.6um counterpart DEC (J2000) from the SPLASH catalog (dec_splash)degpos.eq.decnullableFlagFinal identification flag (final_id_flag) (G1)meta.code.errorintStar[0/100] Star flag (star_flag) (G2)meta.codeintzbest[0/6.9]? Best redshift available (z_best)src.redshift;pos.heliocentricdoublenullablezspec[-0.001/5.4]? Spectroscopic redshift (z_spec)src.redshiftfloatnullableInstSpectroscopic redshift origin (Instr)meta.ref;src.redshiftcharq_zspec[0/2]? Spectroscopic redshift quality (Qg) (3)meta.code.qualfloatnullableClsp[-9/2]? Spectroscopic identification (1=BLAGN, 2=non-BLAGN, 0=star) (spec_type)meta.code.classintnullablezphot[0/6.9]? Photometric redshift from Salvato M. et al. (in prep.) (z_phot)src.redshiftfloatnullableClph[1/5]? Photometric identification from SED fitting (1=unobscured, 2=obscured, 3=galaxy, 5=star) (phot_type)meta.code.classintnullableXMMC? Identifier number of the XMM-COSMOS counterpart from Cappelluti+ (2009, J/A+A/497/635) (id_xmm)meta.id.crossintnullableDist[0/68709]? Luminosity distance (dist_lum)Mpcpos.distance;pos.heliocentricdoublenullableL0.5-10[-45/46]? Rest-frame luminosity in 0.5-10keV (Lx_0510)log(1e-07W)phys.luminosity;em.X-rayfloatnullableL0.5-2[-45/46]? Rest-frame luminosity in 0.5-2keV (Lx_052)log(1e-07W)phys.luminosity;em.X-rayfloatnullableL2-10[-46/46]? Rest-frame luminosity in 2-10keV (Lx_210)log(1e-07W)phys.luminosity;em.X-rayfloatnullableNH[0/99.9]? Intrinsic neutral hydrogen column density (NH)phys.columnDensityfloatnullableC0.5-10[0.4/1]? Luminosity absorption correction in 0.5-10keV band (abs_corr_0510)arith.factorfloatnullableC0.5-2[0.009/1]? Luminosity absorption correction in 0.5-2keV band (abs_corr_052)arith.factorfloatnullableC2-10[0.6/1]? Luminosity absorption correction in 2-10keV band (abs_corr_210)arith.factorfloatnullableb_NH[0/99.9]? Lower limit on intrinsic NH column density (NH_lo)phys.columnDensity;stat.minfloatnullableC0.5-10lo[0.3/1]? Luminosity absorption correction in 0.5-10keV assuming b_NH (abs_corr_0510_lo)arith.factorfloatnullableC0.5-2lo[0.002/1]? Luminosity absorption correction in 0.5-2keV assuming b_NH (abs_corr_052_lo)arith.factorfloatnullableC2-10lo[0.5/1]? Luminosity absorption correction in 2-10keV assuming b_NH (abs_corr_210_lo)arith.factorfloatnullableB_NH[0/99.9]? Upper limit on intrinsic NH column density (NH_up)phys.columnDensity;stat.maxfloatnullableC0.5-10up[0.3/1]? Luminosity absorption correction in 0.5-10keV assuming B_NH (abs_corr_0510_up)arith.factorfloatnullableC0.5-2up[0.001/1]? Luminosity absorption correction in 0.5-2keV assuming B_NH (abs_corr_052_up)arith.factorfloatnullableC2-10up[0.5/1]? Luminosity absorption correction in 2-10keV assuming B_NH (abs_corr_210_up)arith.factorfloatnullableJ/ApJ/817/34/ccosmosChandra COSMOS (C-COSMOS) identification catalogimag[12.4/28.1]? i-band (AB) magnitudemagphot.mag;em.opt.IfloatnullableF2-10keV[-1.7e-14/7e-13] 2-10keV X-ray flux (in erg/cm^2^/s units)mW.m**-2phot.flux;em.X-raydoubleSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOCIAU identificator (HHMMSS.s+DDMMSS; J2000)meta.id;meta.mainchar[ECV2009][1/22962] Chandra identifier (1)meta.idintRAJ2000[149.5/150.7] X-ray RA (J2000) (1)degpos.eq.ra;meta.mainDEJ2000[1.6/2.8] X-ray declination (J2000) (1)degpos.eq.dec;meta.mainF0.5-2keV[-2.1e-15/1.5e-13] 0.5-2keV X-ray flux (in erg/cm^2^/s units)mW.m**-2phot.flux;em.X-raydoubleF0.5-10keV[-1.5e-14/7.5e-13] 0.5-10keV X-ray flux (in erg/cm^2^/s units)mW.m**-2phot.flux;em.X-raydoubleRACdeg[149.5/150.7]? Right ascension of the counterpart (J2000)degpos.eq.ranullableDECdeg[1.6/2.8]? Declination of the counterpart (J2000)degpos.eq.decnullableCOSMOS[136961/2791454]? Optical identifier from Capak+ 2007, II/284meta.id.crossintnullable[ICS2009][89570/1733715]? Optical identifier from Ilbert+ 2009, J/ApJ/690/1236meta.id.crossintnullableRAOdeg[149.5/150.7]? Optical counterpart right ascension (J2000)degpos.eq.ranullableDEOdeg[1.6/2.8]? Optical counterpart declination (J2000)degpos.eq.decnullablee_imag[0/1.4]? imag errormagstat.error;phot.magfloatnullableRAKdeg[149.5/150.7]? K-band counterpart right ascension (J2000)degpos.eq.ranullableDEKdeg[1.6/2.8]? K-band counterpart declination (J2000)degpos.eq.decnullableKmag[13.1/26.6]? K-band (AB) magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.01/2.8]? Kmag errormagstat.error;phot.magfloatnullableRAIdeg[149.5/150.7]? IRAC 3.6um counterpart right ascension (J2000)degpos.eq.ranullableDEIdeg[1.6/2.8]? IRAC 3.6um counterpart declination (J2000)degpos.eq.decnullableF3.6um[0.7/13524]? Spitzer/IRAC 3.6um fluxuJyphot.mag;em.IR.3-4umdoublenullablee_F3.6um[0.08/14.8]? F3.6um erroruJystat.errorfloatnullableFlag[-99/100] Identification flag (G1)meta.code.errorintStar[1/10]? Star identification flag (G2)meta.codeintnullableOffnuc[1]? Off nuclear source identification flag (according to Mainieri+)meta.codeintnullablezspec[0/5.3]? Spectroscopic redshiftsrc.redshiftfloatnullableClsp[0/2]? Spectroscopic classification (1=BLAGN, 2=not-BLAGN, 0=star)meta.code.classintnullableq_zspec[3/9]? Spectroscopic redshift qualitymeta.code.qualintnullabler_zspec[1/8]? Spectroscopic redshift originmeta.ref;pos.frameintnullablezphot[0/6.9]? Photometric redshift from Salvato+ 2011src.redshiftfloatnullableClph[1/3]? Photometric redshift classificationmeta.code.classintnullableXMMC[1/70250]? XMM identifier from Brusa+ 2010, J/ApJ/716/348meta.id.crossintnullable