J/ApJS/155/271ivo://CDS.VizieR/J/ApJS/155/271doi:10.26093/cds/vizier.21550271CDSSzokoly G.P.Bergeron J.Hasinger G.Lehmann I.Kewley L.Mainieri V.,Nonino M.Rosati P.Giacconi R.Gilli R.Gilmozzi R.Norman C.,Romaniello M.Schreier E.Tozzi P.Wang J.X.Zheng W.Zirm A.2008-03-11T10:00:40Z2008-03-11T10:57:28ZCDS support team

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

cds-question@unistra.frx-ray-sourcessurveysphotometryredshiftedWe present the results of our spectroscopic follow-up program of the X-ray sources detected in the 942ks exposure of the Chandra Deep Field-South (CDFS). A total of 288 possible counterparts were observed at the VLT with the FORS1/FORS2 spectrographs for 251 of the 349 Chandra sources (including three additional faint X-ray sources). Spectra and R-band images are shown for all the observed sources and R-K colors are given for most of them. Spectroscopic redshifts were obtained for 168 X-ray sources, of which 137 have both reliable optical identification and redshift estimate (including 16 external identifications). The R<24 observed sample comprises 161 X-ray objects (181 optical counterparts), and 126 of them have unambiguous spectroscopic identification.2004ApJS..155..271Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/155/271CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/155/271https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/155/271http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/155/271https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/155/271https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/155/271http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/155/271GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/155/271/table4 (Optical spectroscopy results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/155/271/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/155/271/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/155/271/table4?GETtext/xml+votable180.050000true53.2895417-27.76766670.005555555555555556Cone search capability for table J/ApJS/155/271/table5 (X-Ray sources not yet published in Giacconi et al., 2002, Cat. <J/ApJS/139/369>)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/155/271/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/155/271/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/155/271/table5?GETtext/xml+votable180.050000true53.1490833-27.82133890.005555555555555556Cone search capability for table J/ApJS/155/271/table8 (Optical counterparts not observed in our program)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/155/271/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/155/271/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/155/271/table8?GETtext/xml+votable180.050000true53.204875-27.91794440.005555555555555556Cone search capability for table J/ApJS/155/271/table9 (Optical spectroscopy results for field galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/155/271/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/155/271/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/155/271/table9?GETtext/xml+votable180.050000true52.9983333-27.83630560.0055555555555555566/35935 35957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/155/271?format=asciiX-rayOpticaldefaultJ/ApJS/155/271/table4Optical spectroscopy resultsEName? Extended source namemeta.id.parentintnullableHRHardness ratio (G4)phot.flux;arith.ratiofloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_EName[wn] Source association (1)meta.codechar[GZW2002]Unique Detection identification number, [GZW2002] XID NNN in Simbad (G1) (2)meta.id;meta.mainintm_[GZW2002][a-e] Multiplicity index on [GZW2002] (G1)meta.code.multipcharn_[GZW2002][*] *: Extended X-ray objectsmeta.notecharMaskMask designationsinstr.paramcharRAJ2000Hour of Right Ascension (J2000) (3)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (3)pos.eq.dec;meta.mainRmag? The R band magnitude (Vega)magphot.mag;em.opt.Rfloatnullablef_Rmag[XW-] Flag on Rmag (G2)meta.codecharl_R-KLimit flag on R-Kmeta.code.error;phot.color;em.opt.RcharR-K? The (R-K) color (Vega)magphot.color;em.opt.R;em.IR.Kfloatnullablef_R-KFlag on R-K (G3)meta.codecharlogLX? Log base 10 of the 0.5-10keV luminosity (4)log(1e-07W)phys.luminosity;em.X-rayfloatnullablez? Best redshift estimate (5)src.redshiftfloatnullableOClassOptical classification (6)meta.code.classcharXClassX-ray classification (7)meta.code.class;src.classcharQualRedshift reliability determination (8)meta.code.qualfloatf_Qual[+] +: we consider the identification final for the X-ray sourcemeta.codecharCommAdditional comments (9)meta.noteJ/ApJS/155/271/table5X-Ray sources not yet published in Giacconi et al., 2002, Cat. <J/ApJS/139/369>l_HFluxLimit flag on FHmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GZW2002]Unique Detection identification number, [GZW2002] XID NNN in Simbadmeta.id;meta.mainintCXOCXO designation (JHHMMSS.s-DDMMSS)meta.idcharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainl_SCtsLimit flag on Smeta.code.errorcharSCtsNet counts in soft (0.5-2keV) bandctphot.count;em.X-rayfloate_SCts? rms uncertainty on Sctstat.errorfloatnullablel_HCtsLimit flag on Hmeta.code.errorcharHCtsNet counts in hard (2-10keV) bandctphot.count;em.X-rayfloate_HCts? rms uncertainty on Hctstat.errorfloatnullableSTimeEffective exposure time in the soft bandkstime.duration;obs.exposure;em.X-ray.softfloatHTimeEffective exposure time in the soft bandkstime.duration;obs.exposure;em.X-ray.softfloatl_SFluxLimit flag on FSmeta.code.errorcharSFluxFlux in soft bandmW.m**-2phot.flux;em.X-rayfloate_SFlux? rms uncertainty on FSmW.m**-2stat.errorfloatnullableHFluxFlux in hard bandmW.m**-2phot.flux;em.X-rayfloate_HFlux? rms uncertainty on FHmW.m**-2stat.errorfloatnullableHRHardness ratio, (H-S)/(H+S) (G4)phot.flux;arith.ratiointJ/ApJS/155/271/table8Optical counterparts not observed in our programrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[1/4] Counterpart type code (1)meta.codeint[GZW2002]Unique Detection identification number, [GZW2002] XID NNN in Simbad (G1)meta.id;meta.mainintm_[GZW2002][a-e] Multiplicity index on [GZW2002] (G1)meta.code.multipcharn_[GZW2002][*] *: Extended X-ray objectmeta.notecharRAJ2000Hour of Right Ascension (J2000) (2)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (2)pos.eq.dec;meta.mainRmag? The R band magnitude (Vega)magphot.mag;em.opt.Rfloatnullablef_Rmag[W] Flag on Rmag (G2)meta.codecharR-K? The (R-K) band color (Vega)magphot.color;em.opt.R;em.IR.Kfloatnullablef_R-K[K - NA] Flag on R-K (G3)meta.codecharHRHardness ratio (G4)phot.flux;arith.ratiofloatJ/ApJS/155/271/table9Optical spectroscopy results for field galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintMaskMask designationsinstr.paramcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainRmag? The R band magnitude (Vega)magphot.mag;em.opt.Rfloatnullablef_Rmag[NA ] NA: No data to determine magnitudemeta.codecharzBest redshift estimate (1)src.redshiftfloatClassClassification (2)meta.code.classcharQual[1/2]? Redshift reliability determination (3)meta.code.qualintnullableCommAdditional commentsmeta.note