J/ApJ/586/814ivo://CDS.VizieR/J/ApJ/586/814doi:10.26093/cds/vizier.15860814CDSMaccarone T.J.Kundu A.Zepf S.E.2004-08-18T20:53:46Z2004-08-18T20:53:02ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryx-ray-sourcesastronomical-object-identificationglobular-star-clustersWe present the results of a Chandra/Hubble Space Telescope (HST) study of the point sources of the Virgo Cluster giant elliptical galaxy NGC 4472. We identify 144 X-ray point sources outside the nuclear region, 72 of which are located within the HST fields. The optical data show 1102 sources, of which 829 have colors consistent with being globular clusters (with only four in the restricted central 10" region). Thirty matches are found between the two lists - these are likely to be low-mass X-ray binaries (LMXBs) associated with globular clusters, while ~42 of the X-ray sources have no optical counterparts to V<~25 and I<~24, indicating that they are likely to be predominantly LMXBs in the field star population with a small amount of possible contamination from background active galactic nuclei. Thus approximately 40% of the X-ray sources are in globular clusters and 4% of the globular clusters contain X-ray sources.2003ApJ...586..814Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/586/814CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/127/367 : Virgo Photometry Catalogue (VPC) (Young+ 1998)J/A+A/402/37 : UV to radio SED of galaxies in Virgo cluster (Boselli+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/586/814https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/586/814http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/586/814https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/586/814https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/586/814http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/586/814GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/586/814/table1 (The X-ray Source List)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/586/814/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/586/814/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/586/814/table1?GETtext/xml+votable180.050000true187.3808338.0152780.005555555555555556Cone search capability for table J/ApJ/586/814/table2 (The Optical Source List)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/586/814/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/586/814/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/586/814/table2?GETtext/xml+votable180.050000true187.4166678.0582780.005555555555555556Cone search capability for table J/ApJ/586/814/table3 (X-Ray/HST Matches)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/586/814/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/586/814/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/586/814/table3?GETtext/xml+votable180.050000true187.41757.9750.0055555555555555566/27719 27730https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/586/814?format=asciiX-rayOpticaldefaultJ/ApJ/586/814/table1The X-ray Source ListrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXIDX-ray catalog Number, [MKZ2003] XID NNNmeta.id;meta.mainintprimaryCXOMKZCXOMKZ Source Name (JHHMMSSs+DDMMSS)meta.id.part;meta.maincharGammaSpectral index in photon spacespect.indexfloatEGamma? 90% error in the positive direction (G1)spect.indexfloatnullableeGamma? 90% error in the negative direction (G1)spect.indexfloatnullableSFluxThe (0.5-2.0keV) X-ray model flux (G2)mW.m**-2phot.flux;em.X-raydoubleHFluxThe (2.0-8.0keV) X-ray model flux (G2)mW.m**-2phot.flux;em.X-raydoubleXLumThe (0.5-8.0keV) X-ray luminosity (G2)1e-07Wphys.luminosity;em.X-raydoubleChi2The chi^2^ of the model fitstat.errorfloatDOFDegrees of freedomstat.fit.dofintGR[YN] Good region flag (3)meta.codecharHSTHST region flag (4)meta.codecharOID? The optical catalog number, [MKZ2003] OID NNNN (5)meta.id.crossintnullable_RAPosition (derived from the CXOMKZ name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from the CXOMKZ name) (declination part)degpos.eq.dec;meta.mainJ/ApJ/586/814/table2The Optical Source ListV-IThe V-I colormagphot.color;em.opt.V;em.opt.IfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOIDOptical catalog number, [MKZ2003] OID NNNNmeta.id;meta.mainintprimaryRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagThe V band magnitudemagphot.mag;em.opt.Vfloate_VmagError in Vmagmagstat.errorfloatImagThe I band magnitudemagphot.mag;em.opt.Ifloate_ImagError in Imagmagstat.errorfloate_V-IError in V-Imagstat.errorfloatHLRadHalf-light radiusarcsecphys.angSize;srcfloate_HLRadError in HLRadarcsecstat.errorfloatCX[YN] Chandra FOV flag (1)meta.codecharGC[YN] Globular cluster color flag (2)meta.codecharXID? X-ray counterpart ID number, [MKZ2003] XID NNN (3)meta.id.crossintnullableJ/ApJ/586/814/table3X-Ray/HST MatchesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXIDX-ray catalog number, [MKZ2003] XID NNNmeta.id;meta.mainintCXOMKZCXOMKZ source name (JHHMMSSs+DDMMSS)meta.id.part;meta.maincharGammaBest-fitting power-law spectral indexspect.indexfloatEGamma? 90% error in the positive direction (G1)spect.indexfloatnullableeGamma? 90% error in the positive direction (G1)spect.indexfloatnullablen_Gamma[fb] Note on Gamma (1)meta.notecharSFlux(0.5-2.0keV) X-ray model flux (G2)mJyphot.flux;em.X-raydoubleHFlux(2.0-8.0keV) X-ray model flux (G2)mJyphot.flux;em.X-raydoubleXLum(0.5-8.0keV) X-ray luminosity (G2)1e-07Wphys.luminosity;em.X-raydoubleChi2chi2 value of the spectral fitstat.fit.paramfloatDOFDegree of freedom of the spectral fitstat.fit.dofintOIDOptical catalog number, [MKZ2003] OID NNNNmeta.id.crossintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.errorfloatImagI magnitudemagphot.mag;em.opt.Ifloate_Imagrms uncertainty on Imagmagstat.errorfloatV-IV-I colour indexmagphot.color;em.opt.V;em.opt.Ifloate_V-Irms uncertainty on V-Imagstat.errorfloatHLRadHalf-light radius of the optical counterpartphys.angSize;srcfloate_HLRadrms uncertainty on HLRadstat.errorfloat