J/ApJS/139/369ivo://CDS.VizieR/J/ApJS/139/369doi:10.26093/cds/vizier.21390369CDSGiacconi R.Zirm A.Wang J.Rosati P.Nonino M.Tozzi P.Gilli R.,Mainieri V.Hasinger G.Kewley L.Bergeron J.Borgani S.Gilmozzi R.,Grogin N.Koekemoer A.Schreier E.Zheng W.Norman C.2002-07-02T13:27:55Z2002-07-02T13:27:35ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesIn this paper we present the source catalog obtained from a 942ks exposure of the Chandra Deep Field South (CDFS), using the Advanced CCD Imaging Spectrometer (ACIS-I) on the Chandra X-ray Observatory. Eleven individual pointings made between 1999 October and 2000 December were combined to generate the final image used for object detection. Catalog generation proceeded simultaneously using two different methods: a method of our own design using a modified version of the SExtractor algorithm, and a wavelet transform technique developed specifically for Chandra observations. The detection threshold has been set in order to have less than 10 spurious sources, as assessed by extensive simulations. We subdivided the catalog into four sections: the primary list consisting of objects common to the two detection methods, two secondary lists containing sources which were detected by (1) the SExtractor algorithm alone and (2) the wavelet technique alone, and the fourth list consisting of possible diffuse or extended sources. The flux limits at the aimpoint for the soft (0.5-2keV) and hard (2-10keV) bands are 5.5x10^-17^erg/s/cm^2^ and 4.5x10^-16^erg/s/cm^2^, respectively. The total number of sources is 346; out of them, 307 were detected in the 0.5-2keV band, and 251 in the 2-10keV band. We also present optical identifications for the catalogued sources. Our primary optical data are R band imaging from VLT/FORS1 to a depth of R~26.5 (Vega). In regions of the field not covered by the VLT/FORS1 deep imaging, we use R-band data obtained with the Wide Field Imager (WFI) on the ESO-MPI 2.2 m telescope, as part of the ESO Imaging Survey (EIS), which cover the entire X-ray survey. We found that the FORS1/Chandra offsets are small, ~1". Coordinate cross-correlation finds 85% of the Chandra sources covered by FORS1 R to have counterparts within the 3{sigma} error box (>~1.5" depending on off-axis angle and X-ray signal-to-noise). The unidentified fraction of sources, approximately ~10%-15%, is close to the limit expected from the observed X-ray flux to R-band ratio distribution for the identified sample.2002ApJS..139..369Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/139/369CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://cxc.harvard.edu/ : the Chandra Home PageJ/AJ/122/2810 : Chandra Deep Field North Survey. V. (Brandt+, 2001)J/A+A/375/1 : IR obs. of Chandra Deep Field + HDF-South (Saracco+, 2001)J/A+A/377/442 : Chandra Deep Field South: R-band photometry (Wolf+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/139/369https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/139/369http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/139/369https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/139/369https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/139/369http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/139/369GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/139/369/table2 (Main Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/139/369/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/139/369/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/139/369/table2?GETtext/xml+votable180.050000true52.9345-27.82421940.005555555555555556Cone search capability for table J/ApJS/139/369/table3 (SExtractor Only)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/139/369/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/139/369/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/139/369/table3?GETtext/xml+votable180.050000true52.9602083-27.845450.005555555555555556Cone search capability for table J/ApJS/139/369/table4 (Wavdetect Only)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/139/369/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/139/369/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/139/369/table4?GETtext/xml+votable180.050000true52.958125-27.82826110.005555555555555556Cone search capability for table J/ApJS/139/369/table5 (Extended Sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/139/369/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/139/369/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/139/369/table5?GETtext/xml+votable180.050000true53.1342083-27.698950.0055555555555555566/35935 35957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/139/369?format=asciiX-raydefaultJ/ApJS/139/369/table2Main CatalogHRHardness ratio (5)phot.flux;arith.ratiofloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOptical cutout identification number (1)obs.fieldint[GZW2002]Unique Detection identification number, [GZW2002] XID NNN in Simbadmeta.idintNameThe IAU Registered Name (2)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000) (3)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (4)pos.eq.dec;meta.mainSCts? Net soft (0.5-2keV) band countsctphot.count;em.X-rayfloatnullablee_SCts? Error in SCtsctstat.errorfloatnullableHCts? Net hard (2-10keV) band countsctphot.count;em.X-rayfloatnullablee_HCts? Error in HCtsctstat.errorfloatnullableSTimeSoft band exposure timekstime.duration;obs.exposurefloatHTimeHard band exposure timekstime.duration;obs.exposurefloatl_SFluxLimit flag on SFluxmeta.code.errorcharSFluxSoft band flux in units of erg/cm^2^/smW.m**-2phot.flux;em.X-raydoublee_SFlux? Error in SFluxmW.m**-2stat.errordoublenullablel_HFluxLimit flag on HFluxmeta.code.errorcharHFluxHard band flux in units of erg/cm^2^/smW.m**-2phot.flux;em.X-raydoublee_HFlux? Error in HFluxmW.m**-2stat.errordoublenullablee_HRError in HRstat.errorfloatPosErrError on the X-ray source position as calculated in the textarcsecstat.errorfloatSep? Separation of the candidate optical counterpartarcsecpos.angDistancefloatnullablel_RmagLimit flag on Rmagmeta.code.errorcharRmagVega R magnitude for the optical counterpartmagphot.mag;em.opt.Rfloate_Rmag? Error on Rmagmagstat.errorfloatnullablef_Rmag[WF] Filter of the Rmag observation (6)meta.code.errorcharJ/ApJS/139/369/table3SExtractor OnlyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOptical cutout identification number (1)obs.fieldint[GZW2002]Unique Detection identification number, [GZW2002] XID NNN in Simbadmeta.idintNameThe IAU Registered Name (2)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000) (3)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (4)pos.eq.dec;meta.mainSCts? Net soft (0.5-2keV) band countsctphot.count;em.X-rayfloatnullablee_SCts? Error in SCtsctstat.errorfloatnullableHCts? Net hard (2-10keV) band countsctphot.count;em.X-rayfloatnullablee_HCts? Error in HCtsctstat.errorfloatnullableSTimeSoft band exposure timekstime.duration;obs.exposurefloatHTimeHard band exposure timekstime.duration;obs.exposurefloatl_SFluxLimit flag on SFluxmeta.code.errorcharSFluxSoft band flux in units of erg/cm^2^/smW.m**-2phot.flux;em.X-raydoublee_SFlux? Error in SFluxmW.m**-2stat.errordoublenullablel_HFluxLimit flag on HFluxmeta.code.errorcharHFluxHard band flux in units of erg/cm^2^/smW.m**-2phot.flux;em.X-raydoublee_HFlux? Error in HFluxmW.m**-2stat.errordoublenullableHRHardness ratio (5)phot.flux;arith.ratiofloate_HRError in HRstat.errorfloatPosErrError on the X-ray source position as calculated in the textarcsecstat.errorfloatSep? Separation of the candidate optical counterpartarcsecpos.angDistancefloatnullablel_RmagLimit flag on Rmagmeta.code.errorcharRmagVega R magnitude for the optical counterpartmagphot.mag;em.opt.Rfloate_Rmag? Error on Rmagmagstat.errorfloatnullablef_Rmag[WF] Filter of the Rmag observation (6)meta.code.errorcharJ/ApJS/139/369/table4Wavdetect OnlyHRHardness ratio (5)phot.flux;arith.ratiofloate_HRError in HRstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDOptical cutout identification number (1)obs.fieldint[GZW2002]Unique Detection identification number, [GZW2002] XID NNN in Simbadmeta.idintNameThe IAU Registered Name (2)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000) (3)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (4)pos.eq.dec;meta.mainSCts? Net soft (0.5-2keV) band countsctphot.count;em.X-rayfloatnullablee_SCts? Error in SCtsctstat.errorfloatnullableHCts? Net hard (2-10keV) band countsctphot.count;em.X-rayfloatnullablee_HCts? Error in HCtsctstat.errorfloatnullableSTimeSoft band exposure timekstime.duration;obs.exposurefloatHTimeHard band exposure timekstime.duration;obs.exposurefloatl_SFluxLimit flag on SFluxmeta.code.errorcharSFluxSoft band flux in units of erg/cm^2^/smW.m**-2phot.flux;em.X-raydoublee_SFlux? Error in SFluxmW.m**-2stat.errordoublenullablel_HFluxLimit flag on HFluxmeta.code.errorcharHFluxHard band flux in units of erg/cm^2^/smW.m**-2phot.flux;em.X-raydoublee_HFlux? Error in HFluxmW.m**-2stat.errordoublenullablePosErrError on the X-ray source position as calculated in the textarcsecstat.errorfloatSep? Separation of the candidate optical counterpartarcsecpos.angDistancefloatnullablel_RmagLimit flag on Rmagmeta.code.errorcharRmagVega R magnitude for the optical counterpartmagphot.mag;em.opt.Rfloate_Rmag? Error on Rmagmagstat.errorfloatnullablef_Rmag[WF] Filter of the Rmag observation (6)meta.code.errorcharJ/ApJS/139/369/table5Extended SourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GZW2002]Unique Detection identification number, [GZW2002] XID NNN in Simbadmeta.idintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSCtsSoft (0.5-2keV) countsctphot.count;em.X-rayfloatSFluxSoft band flux in units of erg/cm^2^/smW.m**-2phot.flux;em.X-raydoubleS/NsoftSignal-to-noise ratio in the soft bandstat.snrfloatFWHM? FWHM of the best fit Gaussian profilearcsecphys.angSize;srcfloatnullableOffAxisOff-axis anglearcmininstr.offsetfloat