J/ApJS/179/142ivo://CDS.VizieR/J/ApJS/179/142doi:10.26093/cds/vizier.21790142CDSBrassington N.J.Fabbiano G.Kim D.-W.Zezas A.Zepf S.Kundu A.,Angelini L.Davies R.L.Gallagher J.Kalogera V.Fragos T.King A.R.,Pellegrini S.Trinchieri G.2017-06-13T11:09:13Z2009-09-27T07:32:05ZCDS support team

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

cds-question@unistra.frx-ray-sourcesWe present the properties of the discrete X-ray sources detected in our monitoring program of the 'typical' elliptical galaxy, NGC 3379, observed with Chandra ACIS-S in five separate pointings, resulting in a co-added exposure of 324ks. From this deep observation, 132 sources have been detected within the region overlapped by all observations, 98 of which lie within the D_25_ ellipse of the galaxy. These 132 sources range in L_X_ from 6x10^35^erg/s (with 3{sigma} upper limit <=4x10^36^erg/s) to ~2x10^39^erg/s, including one source with L_X_>1x10^39^erg/s, which has been classified as an ULX. From optical data, 10 X-ray sources have been determined to be coincident with a globular cluster, these sources tend to have high X-ray luminosity, with three of these sources exhibiting L_X_>1x10^38^erg/s. From X-ray source photometry, it has been determined that the majority of the 132 sources that have well constrained colors, have values that are consistent with typical LMXB spectra. In addition to this, a subpopulation of 10 sources has been found to exhibit very hard spectra and it is expected that most of these sources are absorbed background AGN. There are 64 sources in this population that exhibit long-term variability, indicating that they are accreting compact objects. Five of these sources have been identified as transient candidates, with a further 3 possible transients. Spectral variations have also been identified in the majority of the source population, where a diverse range of variability has been identified, indicating that there are many different source classes located within this galaxy.2008ApJS..179..142Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/179/142CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 2002)J/ApJ/635/1053 : X-ray sources in NGC 3379 (David+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/179/142https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/179/142http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/179/142https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/179/142https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/179/142http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/179/142GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/179/142/master (Master Source List, and coadded Observation values)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/179/142/master?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/179/142/master?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/179/142/master?GETtext/xml+votable180.050000true162.02666712.6058330.0055555555555555566/27515https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/179/142?format=asciiX-raydefaultJ/ApJS/179/142/masterMaster Source List, and coadded Observation valuesC21? X-ray color C21 (log(S1/S2) (G1)phot.count;arith.ratiofloatnullablesrcHc? Net source Hc-band counts (G1)ctphot.count;em.X-rayfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_[BFK2008][<>] Indicates detection with SNR < or > 3meta.notechar[BFK2008]Master identification numbermeta.id;meta.mainintprimaryCXOUIAU identification (JHHMMSS.s+DDMMSS) (2)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainRadSource extraction radiusarcsecphys.angSizefloate_pos? Position uncertainty; see Eq.1arcsecstat.errorfloatnullableSNR? Signal-to-Noise ratiostat.snrfloatnullablel_logLX[<= ] Limit flag on logLXmeta.code.errorcharlogLXLog of 0.3-8.0keV luminosity (3)log(1e-07W)phys.luminosity;em.X-rayfloatl_3logLXLimit flag on logLXmeta.code.errorchar3logLX? The 3{sigma} uncertainty in logLX (3)log(1e-07W)stat.errorfloatnullableLTLong-term source variability (4)meta.code;src.varcharBBShort-term variability from Bayesian block analysis (5)meta.code;src.varcharK-SShort-term variability from Kolmogorov-Smirnov test (5)meta.code;src.varcharOptOptical association (6)meta.codecharDGDistance from center of galaxyarcsecpos.distance;pos.galactocentricfloatn_DG[b] source within optical limits (1)meta.notecharNoteAdditional information (7)meta.notecharl_srcB[<= ] Upper 68% confidence level flag on srcBmeta.code.errorcharsrcBNet source B-band counts (G1)ctphot.count;em.X-rayfloate_srcB? Uncertainty in srcBctstat.errorfloatnullablesrcS1? Net source S1-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcS1? Uncertainty in srcS1ctstat.errorfloatnullablesrcS2? Net source S2-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcS2? Uncertainty in srcS2ctstat.errorfloatnullablesrcS? Net source S-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcS? Uncertainty in srcSctstat.errorfloatnullablesrcH? Net source H-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcH? Uncertainty in srcHctstat.errorfloatnullablesrcSc? Net source Sc-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcSc? Uncertainty in srcScctstat.errorfloatnullablee_srcHc? Uncertainty in srcHcctstat.errorfloatnullableHR? Hardness ratio (G1)phot.flux;arith.ratiofloatnullablee_HR? Lower limit uncertainty in HRstat.errorfloatnullableE_HR? Upper limit uncertainty in HRstat.error;stat.maxfloatnullablee_C21? Lower limit uncertainty in C21stat.errorfloatnullableE_C21? Upper limit uncertainty in C21stat.error;stat.maxfloatnullableC32? X-ray color C32 (log(S2/H) (G1)phot.count;arith.ratiofloatnullablee_C32? Lower limit uncertainty in C32stat.errorfloatnullableE_C32? Upper limit uncertainty in C32stat.error;stat.maxfloatnullablenetB? Net B counts (G1)ctphot.count;em.X-rayfloatnullablerawB? Source B-band counts (G1)ctphot.count;em.X-rayintnullablebkgB? Background B-band counts (G1)ctphot.count;em.X-rayfloatnullablerawS1? Source S1-band counts (G1)ctphot.count;em.X-rayintnullablebkgS1? Background S1-band counts (G1)ctphot.count;em.X-rayfloatnullablerawS2? Source S2-band counts (G1)ctphot.count;em.X-rayintnullablebkgS2? Background S2-band counts (G1)ctphot.count;em.X-rayfloatnullablerawH? Source H-band counts (G1)ctphot.count;em.X-rayintnullablebkgH? Background H-band counts (G1)ctphot.count;em.X-rayfloatnullablerawBc? Source Bc-band counts (G1)ctphot.count;em.X-rayintnullablebkgBc? Background Bc-band counts (G1)ctphot.count;em.X-rayfloatnullablerawSc? Source Sc-band counts (G1)ctphot.count;em.X-rayintnullablebkgSc? Background Sc-band counts (G1)ctphot.count;em.X-rayfloatnullablerawHc? Source Hc-band counts (G1)ctphot.count;em.X-rayintnullablebkgHc? Background Hc-band counts (G1)ctphot.count;em.X-rayfloatnullableJ/ApJS/179/142/obsIndividual observationsHR? Hardness ratio (G1)phot.flux;arith.ratiofloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[1,5] Observation numbermeta.id;obschar[BFK2008]Master identification numbermeta.id;meta.mainintl_srcB[<= ] Upper 68% confidence level flag on srcBmeta.code.errorcharsrcBNet source B-band counts (G1)ctphot.count;em.X-rayfloate_srcB? Uncertainty in srcBctstat.errorfloatnullablesrcS1? Net source S1-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcS1? Uncertainty in srcS1ctstat.errorfloatnullablesrcS2? Net source S2-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcS2? Uncertainty in srcS2ctstat.errorfloatnullablesrcS? Net source S-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcS? Uncertainty in srcSctstat.errorfloatnullablesrcH? Net source H-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcH? Uncertainty in srcHctstat.errorfloatnullablesrcSc? Net source Sc-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcSc? Uncertainty in srcScctstat.errorfloatnullablesrcHc? Net source Hc-band counts (G1)ctphot.count;em.X-rayfloatnullablee_srcHc? Uncertainty in srcHcctstat.errorfloatnullablee_HR? Lower limit uncertainty in HRstat.errorfloatnullableE_HR? Upper limit uncertainty in HRstat.error;stat.maxfloatnullableC21? X-ray color C21 = log(S1/S2) (G1)phot.count;arith.ratiofloatnullablee_C21? Lower limit uncertainty in C21stat.errorfloatnullableE_C21? Upper limit uncertainty in C21stat.error;stat.maxfloatnullableC32? X-ray color C32 = log(S2/H) (G1)phot.count;arith.ratiofloatnullablee_C32? Lower limit uncertainty in C32stat.errorfloatnullableE_C32? Upper limit uncertainty in C32stat.error;stat.maxfloatnullableBBShort-term variability from Bayesian block analysis (2)meta.code;src.varcharK-SShort-term variability from Kolmogorov-Smirnov test (2)meta.code;src.varcharSig? Significance of change in L_X_ (3)stat.fit.goodnessfloatnullablel_logLX[<=] Upper 68% confidence level flag on logLXmeta.code.errorcharlogLXLog of 0.3-8.0keV luminosity (4)log(1e-07W)phys.luminosity;em.X-rayfloat