J/ApJS/184/158ivo://CDS.VizieR/J/ApJS/184/158doi:10.26093/cds/vizier.21840158CDSElvis M.Civano F.Vignali C.Puccetti S.Fiore F.Cappelluti N.,Aldcroft T.L.Fruscione A.Zamorani G.Comastri A.Brusa M.Gilli R.,Miyaji T.Damiani F.Koekemoer A.M.Finoguenov A.Brunner H.,Urry C.M.Silverman J.Mainieri V.Hasinger G.Griffiths R.,Carollo M.Hao H.Guzzo L.Blain A.Calzetti D.Carilli C.Capak P.,Ettori S.Fabbiano G.Impey C.Lilly S.Mobasher B.Rich M.,Salvato M.Sanders D.B.Schinnerer E.Scoville N.Shopbell P.,Taylor J.E.Taniguchi Y.Volonteri M.2014-05-07T12:31:43Z2010-04-01T08:56:07ZCDS support team

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

cds-question@unistra.frx-ray-sourcessurveysThe Chandra COSMOS Survey (C-COSMOS) is a large, 1.8Ms, Chandra program that has imaged the central 0.5deg^2^ of the COSMOS field (centered at 10h, +02d) with an effective exposure of ~160ks, and an outer 0.4deg^2^ area with an effective exposure of ~80ks. The limiting source detection depths are 1.9x10^-16^erg/cm2/s in the soft (0.5-2keV) band, 7.3x10^-16^erg/cm2/s in the hard (2-10keV) band, and 5.7x10^-16^erg/cm2/s in the full (0.5-10keV) band. Here we describe the strategy, design, and execution of the C-COSMOS survey, and present the catalog of 1761 point sources detected at a probability of being spurious of <2x10^-5^ (1655 in the full, 1340 in the soft, and 1017 in the hard bands). By using a grid of 36 heavily (~50%) overlapping pointing positions with the ACIS-I imager, a remarkably uniform (+/-12%) exposure across the inner 0.5deg^2^ field was obtained, leading to a sharply defined lower flux limit. The widely different point-spread functions obtained in each exposure at each point in the field required a novel source detection method, because of the overlapping tiling strategy, which is described in a companion paper. This method produced reliable sources down to a 7-12 counts, as verified by the resulting logN-logS curve, with subarcsecond positions, enabling optical and infrared identifications of virtually all sources, as reported in a second companion paper.2009ApJS..184..158Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/184/158CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)J/ApJS/172/29 : XMM-Newton survey in COSMOS field. I. (Hasinger+, 2007)J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS field (Cappelluti+ 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/184/158https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/184/158http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/184/158https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/184/158https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/184/158http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/184/158GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/184/158/catalog (C-COSMOS bright source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/184/158/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/184/158/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/184/158/catalog?GETtext/xml+votable180.050000true150.170462.21880.005555555555555556Cone search capability for table J/ApJS/184/158/table3 (Chandra-COSMOS observation summary)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/184/158/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/184/158/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/184/158/table3?GETtext/xml+votable180.050000true150.50854172.37679440.005555555555555556Chandra5/6814 6/27247https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/184/158?format=asciiX-raydefaultJ/ApJS/184/158/catalogC-COSMOS bright source catalogSeqSource identificationmeta.idintFExp? Full 0.5-7keV exposure time (1)kstime.duration;obs.exposure;em.X-ray.mediumfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOCChandra-COSMOS source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainePosPositional uncertaintyarcsecstat.errorfloatFRate? Full 0.5-7keV count rate (1)ct/sphot.count;em.X-raydoublenullablee_FRateError in FRatect/sphot.count;em.X-raydoubleFFlux? Full 0.5-10keV flux; {gamma}=1.4 (1)mW.m**-2phot.flux;em.X-raydoublenullablee_FFluxError in FFluxmW.m**-2phot.flux;em.X-raydoubleFSNR? Full 0.5-7keV signal-to-noise (1)stat.snrfloatnullableFctsA? Full 0.5-7keV aperture photometry net countsctphot.count;em.X-rayfloatnullablee_FctsA? Error in FctsA (1)ctphot.count;em.X-rayfloatnullableFExpA? Full 0.5-7keV exposure time from aperture photometrykstime.duration;obs.exposure;em.X-ray.mediumfloatnullableSRate? Soft 0.5-2keV count rate (1)ct/sphot.count;em.X-raydoublenullablee_SRateError in SRatect/sphot.count;em.X-raydoubleSFlux? Soft 0.5-2keV flux; {gamma}=1.4 (1)mW.m**-2phot.flux;em.X-raydoublenullablee_SFluxError in SFluxmW.m**-2phot.flux;em.X-raydoubleSSNR? Soft 0.5-2keV signal-to-noise (1)stat.snrfloatnullableSExp? Soft 0.5-2keV exposure time (1)kstime.duration;obs.exposure;em.X-ray.softfloatnullableSctsA? Soft 0.5-2keV aperture photometry net counts (1)ctphot.count;em.X-rayfloatnullablee_SctsA? Error in SctsA (1)ctphot.count;em.X-rayfloatnullableSExpA? Soft 0.5-2keV exposure time from aperture photometrykstime.duration;obs.exposure;em.X-ray.softfloatnullableHRate? Hard 2-7keV count rate (1)ct/sphot.count;em.X-raydoublenullablee_HRateError in HRatect/sphot.count;em.X-raydoubleHFlux? Hard 2-10keV flux; {gamma}=1.4 (1)mW.m**-2phot.flux;em.X-raydoublenullablee_HFluxError in HFluxmW.m**-2phot.flux;em.X-raydoubleHSNR? Hard 2-7keV signal-to-noise (1)stat.snrfloatnullableHExp? Hard 2-7keV exposure time (1)kstime.duration;obs.exposure;em.X-ray.mediumfloatnullableHctsA? Hard 2-7keV aperture photometry net countsctphot.count;em.X-rayfloatnullablee_HctsA? Error in HctA (1)ctphot.count;em.X-rayfloatnullableHExpA? Hard 2-7keV exposure time from aperture photometrykstime.duration;obs.exposure;em.X-ray.mediumfloatnullableHR? Hardness ratio; (H-S)/(H+S) (1)phot.fluxfloatnullableHRup? The 90% lower limit on HR (1)phot.flux;arith.ratiofloatnullableHRlow? The 90% upper limit on HR (1)phot.flux;arith.ratiofloatnullableCosmosDisplay the COSMOS data (Capak et al. 2007, Cat. II/284)meta.ref.urlcharJ/ApJS/184/158/table3Chandra-COSMOS observation summaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsObservation numbermeta.id;obsintFieldCOSMOS fieldmeta.id;obs.fieldcharDateObservation start (UT)time.epochnullableTimeTime of observation start (hh:mm)time.epochcharExpExposure time (1)kstime.duration;obs.exposurefloatRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainRollRoll angle of the COSMOS fielddegpos.posAng;obs.fieldfloat