J/ApJ/651/1098ivo://CDS.VizieR/J/ApJ/651/1098doi:10.26093/cds/vizier.16511098CDSHeinke C.O.Wijnands R.Cohn H.N.Lugger P.M.Grindlay J.E.Pooley D.,Lewin W.H.G.2008-11-11T08:05:55Z2008-11-11T09:02:04ZCDS support team

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

cds-question@unistra.frglobular-star-clustersx-ray-sourcesWe report our analysis of a Chandra X-ray observation of the rich globular cluster Terzan 5, in which we detect 50 sources to a limiting 1.0-6keV X-ray luminosity of 3x10^31^ergs/s within the half-mass radius of the cluster. Thirty-three of these have LX>10^32^ergs/s, the largest number yet seen in any globular cluster. In addition to the quiescent low-mass X-ray binary (LMXB; identified by Wijnands et al., 2005ApJ...618..883W), another 12 relatively soft sources may be quiescent LMXBs. We compare the X-ray colors of the harder sources in Terzan 5 to the Galactic center sources studied by Muno and collaborators (2003, Cat. <J/ApJ/589/225>) and find the Galactic center sources to have harder X-ray colors, indicating a possible difference in the populations. We cannot clearly identify a metallicity dependence in the production of low-luminosity X-ray binaries in Galactic globular clusters, but a metallicity dependence of the form suggested by Jordan et al. (2004, Cat. <J/ApJ/613/270>) for extragalactic LMXBs is consistent with our data.2006ApJ...651.1098Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/651/1098CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/308/733 : NTT VI photometry in Terzan 5 (Ortolani+ 1996)J/ApJ/589/225 : Chandra X-ray sources toward Galactic Center (Feigelson+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/651/1098https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/651/1098http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/651/1098https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/651/1098https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/651/1098http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/651/1098GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/651/1098/table2 (Serendipitous sources in the Terzan 5 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/651/1098/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/651/1098/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/651/1098/table2?GETtext/xml+votable180.050000true267.09505417-24.766850.005555555555555556Cone search capability for table J/ApJ/651/1098/table1 (X-Ray Sources in Terzan 5)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/651/1098/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/651/1098/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/651/1098/table1?GETtext/xml+votable180.050000true267.0191125-24.778319440.0055555555555555566/28899 28905https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/651/1098?format=asciiX-raydefaultJ/ApJ/651/1098/table2Serendipitous sources in the Terzan 5 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOGlbJCXOGlbJ name (HHMMSS.s+DDMMSS), CXOGlb JHHMMSS.s+DDMMSS in Simbadmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.maine_RAJ2000rms uncertainty on RAsstat.error;pos.eq.rafloatDEJ2000Declination (J2000)pos.eq.dec;meta.maine_DEJ2000rms uncertainty on DEarcsecstat.error;pos.eq.decfloatDistDistance from the center of Terzan 5arcsecpos.angDistancefloatC(0.5-2)Counts in 0.5-2keV bandctphot.count;em.X-rayfloatE_C(0.5-2)Error on C(0.5-2keV) (upper limit)ctstat.error;stat.maxfloate_C(0.5-2)Error on C(0.5-2keV) (lower limit)ctstat.errorfloatC(2-6)Counts in 2-6keV bandctphot.count;em.X-rayfloatE_C(2-6)Error on C(2-6keV) (upper limit)ctstat.error;stat.maxfloate_C(2-6)Error on C(2-6keV) (lower limit)ctstat.errorfloatF(0.5-6)X-ray flux in the 0.5-6keV band (1)aW.m**-2phot.flux;em.X-rayfloatE_F(0.5-6)Error on F(0.5-6keV) (upper limit)aW.m**-2stat.error;stat.maxfloate_F(0.5-6)Error on F(0.5-6keV) (lower limit)aW.m**-2stat.errorfloatNotes[c?] Likely optical counterparts (c) or less likely counterparts (?)meta.notecharFlag[*] source used to align X-ray positionsmeta.code.errorcharBmag? B magnitude (2)magphot.mag;em.opt.BfloatnullableRmag? R magnitude (2)magphot.mag;em.opt.RfloatnullableImag? I magnitude (2)magphot.mag;em.opt.IfloatnullableJ/ApJ/651/1098/table1X-Ray Sources in Terzan 5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCX[1/50] CX (Chandra) number, [HWC2006] CX NN in Simbadmeta.idintCXOGlbJCXOGlbJ name (HHMMSS.s+DDMMSS), CXOGlb JHHMMSS.s+DDMMSS in Simbadmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.maine_RAJ2000rms uncertainty on RAsstat.error;pos.eq.rafloatDEJ2000Declination (J2000)pos.eq.dec;meta.maine_DEJ2000rms uncertainty on DEarcsecstat.error;pos.eq.decfloatDistDistance from the center of Terzan 5arcsecpos.angDistancefloatC(0.5-2)Counts in 0.5-2keV bandctphot.count;em.X-rayfloatE_C(0.5-2)Error on C(0.5-2keV) (upper limit)ctstat.error;stat.maxfloate_C(0.5-2)Error on C(0.5-2keV) (lower limit)ctstat.errorfloatC(2-6)Counts in 2-6keV bandctphot.count;em.X-rayfloatE_C(2-6)Error on C(2-6keV) (upper limit)ctstat.error;stat.maxfloate_C(2-6)Error on C(2-6keV) (lower limit)ctstat.errorfloatLX(1-6)X-ray luminosity in the 1-6keV band1e+23Wphys.luminosity;em.X-rayintE_LX(1-6)Error on LX(1-6keV) (upper limit)1e+23Wstat.error;stat.maxinte_LX(1-6)Error on LX(1-6keV) (lower limit)1e+23Wstat.errorintLX(0.5-2.5)X-ray luminosity in the 0.5-2.5keV band1e+23Wphys.luminosity;em.X-rayintE_LX(0.5-2.5)Error on LX(0.5-2.5keV) (upper limit)1e+23Wstat.error;stat.maxinte_LX(0.5-2.5)Error on LX(0.5-2.5keV) (lower limit)1e+23Wstat.errorintNotesNotes (1)meta.notechar[HEG2003]Heinke et al. (2003ApJ...590..809H) designationmeta.idchar