J/ApJS/203/15ivo://CDS.VizieR/J/ApJS/203/15doi:10.26093/cds/vizier.22030015CDSBonzini M.Mainieri V.Padovani P.Kellermann K.I.Miller N.,Rosati P.Tozzi P.Vattakunnel S.Balestra I.Brandt W.N.Luo B.,Xue Y.Q.2023-02-03T11:41:24Z2013-01-21T15:11:30ZCDS support team

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

cds-question@unistra.frradio-sourcesastronomical-object-identificationx-ray-sourcesredshiftedsurveysinfrared-photometryvisible-astronomyphotometryWe study a sample of 883 sources detected in a deep Very Large Array survey at 1.4GHz in the Extended Chandra Deep Field South. This paper focuses on the identification of their optical and infrared (IR) counterparts. We use a likelihood-ratio technique that is particularly useful when dealing with deep optical images to minimize the number of spurious associations. We find a reliable counterpart for 95% of our radio sources. Most of the counterparts (74%) are detected at optical wavelengths, but there is a significant fraction (21%) that are only detectable in the IR. Combining newly acquired optical spectra with data from the literature, we are able to assign a redshift to 81% of the identified radio sources (37% spectroscopic). We also investigate the X-ray properties of the radio sources using the Chandra 4Ms and 250ks observations. In particular, we use a stacking technique to derive the average properties of radio objects undetected in the Chandra images. The results of our analysis are collected in a new catalog containing the position of the optical/IR counterpart, the redshift information, and the X-ray fluxes. It is the deepest multi-wavelength catalog of radio sources, which will be used for future study of this galaxy population.2012ApJS..203...15Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/203/15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/261 : GOODS initial results (Giavalisco+, 2004)J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)J/ApJ/727/1 : IRAC/MUSYC SIMPLE survey (Damen+, 2011)J/ApJS/191/124 : Opt. spectroscopy of ECDF-S X-ray sources (Silverman+, 2010)J/ApJS/189/270 : MUSYC optical imaging in ECDF-S (Cardamone+, 2010)J/A+A/511/A50 : JHks of GOODS-South field (Retzlaff+, 2010)J/ApJ/693/1713 : Spectroscopy of X-ray sources in ECDF-S (Treister+, 2009)J/ApJS/183/295 : A K-selected catalog of the ECDFS from MUSYC (Taylor+, 2009)J/A+A/504/751 : GOODS-MUSIC catalog updated version (Santini+, 2009)J/A+A/478/83 : GOODS-South Field VLT/FORS2 redshifts. III. (Vanzella+, 2008)J/ApJS/179/114 : VLA 1.4GHz survey of E-CDF-S (Miller+, 2008)J/A+A/465/1099 : Redshift catalog of 691 objects in CDFS (Ravikumar+, 2007)J/AJ/132/2409 : Deep ATLAS radio observations of CDFS (Norris+, 2006)J/A+A/456/881 : EIS: infrared deep public survey (Olsen+, 2006)J/ApJS/161/21 : Extended Chandra Deep Field-South survey (Lehmer+, 2005)J/ApJS/155/271 : CDF-S: Optical spectroscopy (Szokoly+, 2004)J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/203/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/203/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/203/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/203/15https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/203/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/203/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/203/15/table3 (Radio information and identification process results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/203/15/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/203/15/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/203/15/table3?GETtext/xml+votable180.050000true52.7945417-28.05633330.0055555555555555566/35934-35935 359579.276497240453405e-25 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/203/15?format=asciiX-rayOpticalInfraredRadiodefaultJ/ApJS/203/15/table3Radio information and identification process resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRIDRadio source identification numbermeta.id;meta.mainintprimaryCmeta.ref.urlcharRAJ2000[3] Radio Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[27/28] Radio Degree of Declination (J2000)pos.eq.dec;meta.mainSr[30.2/90450] Radio flux density at 1.4GHzuJyphot.flux.density;em.radio.750-1500MHzfloate_SrThe 1{sigma} error in SruJystat.errorfloatS/NSignal-to-Noisestat.snrfloatSimbadSimbad column added by the CDSmeta.ref.urlcharRAC? Counterpart Hour of Right Ascension (J2000)meta.id.assoc;pos.eq.ranullableDEC? Counterpart Degree of Declination (J2000)meta.id.assoc;pos.eq.decnullableRel[0.6/10]? Reliability of the association (1)stat.weightfloatnullableSep[0/2.3]? Distance between radio and counterpartarcsecpos.angDistancefloatnullableCCatCounterpart catalog (2)meta.id;meta.datasetcharM08Cross-match with Miller et al., 2008, Cat. J/ApJS/179/114 within 1"meta.ref.urlintnullableCatCross-match with counterpart catalogs MUSYC (J/ApJ/727/1 and J/ApJS/183/295), GOODS (II/261 and J/A+A/511/A50) and EIS within 1"meta.ref.urlintnullableJ/ApJS/203/15/table5Main characteristics and redshift information of the radio source counterpartsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRIDRadio identification numbermeta.id;meta.mainintRmag[16.23/26.77]? WFI catalog (Cat. II/261) R band AB magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag? Error in Rmagmagstat.error;phot.magfloatnullableKmag[14.73/22.62]? MUSYC catalog (Cat. J/ApJS/183/295) K_S_ band AB magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Error in Kmagmagstat.error;phot.magfloatnullable[3.6]? SIMPLE catalog (Cat. J/ApJ/727/1) 3.6 micron band AB magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? Error in 3.6magmagstat.errorfloatnullablez[0/6.99]? Best redshift of counterpart (1)src.redshiftfloatnullablezph? Photometric redshiftsrc.redshiftfloatnullablee_zph? Lower 68% uncertainty in zphotstat.errorfloatnullableE_zph? Upper 68% uncertainty in zphotstat.error;stat.maxfloatnullableXID? X-ray identifier (5)meta.idintnullabler_zphReference for zphot (2)meta.ref;pos.framecharzsp[0/4.5]? Spectroscopic redshiftmagsrc.redshift;pos.heliocentricfloatnullableq_zsp? Quality flag, 3=secure (3)meta.code.qualintnullabler_zspReference for zspec (4)meta.ref;pos.framecharSoft? Soft X-ray (0.5-2keV) band flux; erg/s/cm^2^mW.m**-2phot.flux;em.X-raydoublenullablee_Soft? Error in SoftmW.m**-2stat.errordoublenullableHard? Hard X-ray (2-10keV) band flux; erg/s/cm^2^mW.m**-2phot.flux;em.X-raydoublenullablee_Hard? Error in HardmW.m**-2stat.errordoublenullable