J/ApJ/625/796ivo://CDS.VizieR/J/ApJ/625/796doi:10.26093/cds/vizier.16250796CDSHeinke C.O.Grindlay J.E.Edmonds P.D.Cohn H.N.Lugger P.M.,Camilo F.Bogdanov S.Freire P.C.2017-06-12T08:24:45Z2007-10-17T17:27:11ZCDS support team

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

cds-question@unistra.frglobular-star-clustersx-ray-sourcesvariable-starsWe have detected 300 X-ray sources within the half-mass radius (2.79') of the globular cluster 47 Tucanae in a deep (281ks) Chandra exposure. We perform photometry and simple spectral fitting for our detected sources and construct luminosity functions, X-ray color-magnitude, and color-color diagrams. Eighty-seven X-ray sources show variability on timescales from hours to years. Thirty-one of the new X-ray sources are identified with chromospherically active binaries from the catalogs of Albrow and coworkers (2001, Cat. <J/ApJ/559/1060>). We estimate that the total number of neutron stars in 47 Tuc is of order 300, reducing the discrepancy between theoretical neutron star retention rates and observed neutron star populations in globular clusters. Comprehensive tables of source properties and simple spectral fits are provided electronically.2005ApJ...625..796Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/625/796CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/other/Sci/292.2290 : Chandra compact binaries in 47 Tuc (Grindlay+, 2001)J/AJ/127/1588 : 47 Tuc main-sequence star abundances (Briley+, 2004)J/ApJ/559/1060 : Variables in 47 Tuc (Albrow+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/625/796https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/625/796http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/625/796https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/625/796https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/625/796http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/625/796GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/625/796/sources (47 Tuc X-ray source properties, 2002 dataset)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/625/796/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/625/796/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/625/796/sources?GETtext/xml+votable180.050000true6.01455833-72.081094440.005555555555555556Cone search capability for table J/ApJ/625/796/table3 (47 Tuc basic X-ray source properties, 2000 dataset)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/625/796/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/625/796/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/625/796/table3?GETtext/xml+votable180.050000true6.0145375-72.081088890.0055555555555555566/33321https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/625/796?format=asciiX-raydefaultJ/ApJ/625/796/sources47 Tuc X-ray source properties, 2002 datasete_Ct2Lower limit 1{sigma} error in Cts2ctstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintoThe asterisk indicates a source present in the 2000 dataset (table 3)meta.notechar[GHE2001]The WAVDETECT detection number ([GHE2001] WNNN in Simbad) (G1)meta.id;meta.mainintprimaryCXOGlbThe IAU-approved source name (CXOGlb JHHMMSS.s+DDMMSS in Simbad)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.maine_RAJ2000The 1{sigma} error in RAssstat.error;pos.eq.rafloatDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maine_DEJ2000The 1{sigma} error in DEsarcsecstat.error;pos.eq.decfloatDist? Distance from cluster center (2)arcsecpos.angDistanceintnullablefPSF? The point spread function fractioninstr.det.psffloatnullablefEXP? Fractional exposure time (3)time.duration;obs.exposurefloatnullablect1Background-subtracted 0.5-4.5keV countsctphot.count;em.X-rayfloatE_ct1Upper limit 1{sigma} error in cts1ctstat.error;stat.maxfloate_ct1Lower limit 1{sigma} error in cts1ctstat.errorfloatct2Background-subtracted 0.5-1.5keV countsctphot.count;em.X-rayfloatE_ct2Upper limit 1{sigma} error in cts2ctstat.error;stat.maxfloate_ct2Lower limit 1{sigma} error in cts2ctstat.errorfloatct3Background-subtracted 1.5-6keV countsctphot.count;em.X-rayfloatE_ct3Upper limit 1{sigma} error in cts3ctstat.error;stat.maxfloate_ct3Lower limit 1{sigma} error in cts3ctstat.errorfloatLum1The 0.5-6.0keV luminosity (4)1e+23Wphys.luminosity;em.X-rayfloatE_Lum1Upper limit 1{sigma} error in Lum11e+23Wstat.error;stat.maxfloate_Lum1Lower limit 1{sigma} error in Lum11e+23Wstat.errorfloatLum2The 0.5-2.5keV luminosity (4)1e+23Wphys.luminosity;em.X-rayfloatE_Lum2Upper limit 1{sigma} error in Lum21e+23Wstat.error;stat.maxfloate_Lum2Lower limit 1{sigma} error in Lum21e+23Wstat.errorfloatTypeClassification of the source (5)src.classcharu_Type[?] Uncertainty flag on Typemeta.notecharONamesOther names (6)meta.idcharNotesVariability or confusion notes (G2)meta.notecharfPSF1The 1.5keV point-spread function fractioninstr.det.psffloatfEXP1Fractional exposure time (2)time.duration;obs.exposurefloatCt1Background-subtracted 0.3-8.0keV countsctphot.count;em.X-rayfloatE_Ct1Upper limit 1{sigma} error in Cts1ctstat.error;stat.maxfloate_Ct1Lower limit 1{sigma} error in Cts1ctstat.errorfloatCt2Background-subtracted 0.3-0.8keV countsctphot.count;em.X-rayfloatE_Ct2Upper limit 1{sigma} error in Cts2ctstat.error;stat.maxfloatCt3Background-subtracted 0.8-2.0keV countsctphot.count;em.X-rayfloatE_Ct3Upper limit 1{sigma} error in Cts3ctstat.error;stat.maxfloate_Ct3Lower limit 1{sigma} error in Cts3ctstat.errorfloatCt4Background-subtracted 2.0-8.0keV countsctphot.count;em.X-rayfloatE_Ct4Upper limit 1{sigma} error in Cts4ctstat.error;stat.maxfloate_Ct4Lower limit 1{sigma} error in Cts4ctstat.errorfloatHR1The first hardness ratio, HR1=(Ct4-Ct3)/(Ct4+Ct3) (3)phot.flux;arith.ratiofloatE_HR1Upper limit 1{sigma} error in HR1stat.error;stat.maxfloate_HR1Lower limit 1{sigma} error in HR1stat.errorfloatHR2The second hardness ratio, HR2=(Ct3-Ct2)/(Ct3+Ct2) (3)phot.flux;arith.ratiofloatE_HR2Upper limit 1{sigma} error in HR2stat.error;stat.maxfloate_HR2Lower limit 1{sigma} error in HR2stat.errorfloatHR3The third hardness ratio, HR3=(Ct4-Ct2)/(Ct4+Ct2) (3)phot.flux;arith.ratiofloatE_HR3Upper limit 1{sigma} error in HR3stat.error;stat.maxfloate_HR3Lower limit 1{sigma} error in HR3stat.errorfloatHR4The fourth hardness ratio, HR4=Ct(0.5-1.5keV)/Ct(1.5-6keV) (3)phot.flux;arith.ratiofloatE_HR4Upper limit 1{sigma} error in HR4stat.error;stat.maxfloate_HR4Lower limit 1{sigma} error in HR4stat.errorfloatJ/ApJ/625/796/table347 Tuc basic X-ray source properties, 2000 datasete_RAJ2000The 1{sigma} error in RAssstat.error;pos.eq.rafloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GHE2001]The WAVDETECT detection number ([GHE2001] WNNN in Simbad) (G1)meta.id;meta.mainintCXOGlbThe IAU-approved source name (CXOGlb JHHMMSS.s+DDMMSS in Simbad)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maine_DEJ2000The 1{sigma} error in DEsarcsecstat.error;pos.eq.decfloatDist? Distance from cluster center (2)arcsecpos.angDistanceintnullablefPSF? The point spread function fractioninstr.det.psffloatnullablefEXP? Fractional exposure time (3)time.duration;obs.exposurefloatnullablect1Background-subtracted 0.5-4.5keV countsctphot.count;em.X-rayfloatE_ct1Upper limit 1{sigma} error in cts1ctstat.error;stat.maxfloate_ct1Lower limit 1{sigma} error in cts1ctstat.errorfloatct2Background-subtracted 0.5-1.5keV countsctphot.count;em.X-rayfloatE_ct2Upper limit 1{sigma} error in cts2ctstat.error;stat.maxfloate_ct2Lower limit 1{sigma} error in cts2ctstat.errorfloatct3Background-subtracted 1.5-6keV countsctphot.count;em.X-rayfloatE_ct3Upper limit 1{sigma} error in cts3ctstat.error;stat.maxfloate_ct3Lower limit 1{sigma} error in cts3ctstat.errorfloatLum1The 0.5-6.0keV luminosity (4)1e+23Wphys.luminosity;em.X-rayfloatE_Lum1Upper limit 1{sigma} error in Lum11e+23Wstat.error;stat.maxfloate_Lum1Lower limit 1{sigma} error in Lum11e+23Wstat.errorfloatLum2The 0.5-2.5keV luminosity (4)1e+23Wphys.luminosity;em.X-rayfloatE_Lum2Upper limit 1{sigma} error in Lum21e+23Wstat.error;stat.maxfloate_Lum2Lower limit 1{sigma} error in Lum21e+23Wstat.errorfloatTypeClassification of the source (5)src.classcharu_Type[?] Uncertainty flag on Typemeta.notecharONamesOther names (6)meta.idcharNotesVariability or confusion notes (G2)meta.notecharJ/ApJ/625/796/table4New optical counterpart identificationsPerPerioddtime.periodfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GHE2001]The WAVDETECT detection number ([GHE2001] WNNN in Simbad) (G1)meta.id;meta.mainintCXOGlbThe IAU-approved source name (CXOGlb JHHMMSS.s+DDMMSS in Simbad)meta.idcharONameName from 2001ApJ...559.1060Ameta.idcharoRAOffset from aligned Chandra Right Ascensionarcsecpos.eq.ra;arith.difffloatoDEOffset from aligned Chandra Declinationarcsecpos.eq.dec;arith.difffloatSepSeparation/Errorpos.angDistancefloatVarTypeVariability type according to Albrow et al., 2001, Cat. <J/ApJ/559/1060>meta.note;src.varcharJ/ApJ/625/796/table7Spectral Fits to 47 Tuc SourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GHE2001]The WAVDETECT detection number ([GHE2001] WNNN in Simbad) (G1)meta.id;meta.mainintCXOGlbIAU-approved source name (CXOGlb JHHMMSS.s+DDMMSS in Simbad)meta.idcharCtsBackground-subtracted 0.3-8.0keV countsctphot.count;em.X-rayfloatNHVMEKAL hydrogen column density fit (2)1e+20cm**-2phys.columnDensity;meta.modelledfloatE_NH? Upper limit 1{sigma} error in NH1e+20cm**-2stat.error;stat.maxfloatnullablee_NH? Lower limit 1{sigma} error in NH1e+20cm**-2stat.errorfloatnullablekTVMEKAL temperature fit (2)keVphys.temperaturefloatE_kT? Upper limit 1{sigma} error in kTkeVstat.error;stat.maxfloatnullablee_kT? Lower limit 1{sigma} error in kTkeVstat.error;phys.energyfloatnullableEMVMEKAL emission measure fit (2)1e+54cm**-3phys.emissMeasure;meta.modelledfloatE_EM? Upper limit 1{sigma} error in EM1e+54cm**-3stat.error;stat.maxdoublenullablee_EM? Lower limit 1{sigma} error in EM1e+54cm**-3stat.errorfloatnullableLumXAbsorbed 0.5-6keV luminosity (3)1e+23Wphys.luminosity;em.X-rayfloatE_LumX? Upper limit 1{sigma} error in LumX1e+23Wstat.error;stat.maxfloatnullablee_LumX? Lower limit 1{sigma} error in LumX1e+23Wstat.errorfloatnullableLumXunUnabsorbed 0.5-6keV luminosity (4)1e+23Wphys.luminosity;em.X-rayfloatchi2The {chi}^2^_{nu}_/{nu} value (5)stat.fit.chi2charNotesNotes Variability or confusion notes (G2)meta.notechar