J/ApJ/827/46ivo://CDS.VizieR/J/ApJ/827/46doi:10.26093/cds/vizier.18270046CDSKuntz K.D.Long K.S.Kilgard R.E.2019-08-22T11:48:03Z2016-12-16T13:25:53ZCDS support team

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

cds-question@unistra.frgalaxiesx-ray-sourcesastronomical-object-identificationWe have obtained a deep X-ray image of the nearby galaxy M51 using Chandra. Here we present the catalog of X-ray sources detected in these observations and provide an overview of the properties of the point-source population. We find 298 sources within the D_25_ radii of NGC 5194/5, of which 20% are variable, a dozen are classical transients, and another half dozen are transient-like sources. The typical number of active ultraluminous X-ray sources in any given observation is ~5, and only two of those sources persist in an ultraluminous state over the 12yr of observations. Given reasonable assumptions about the supernova remnant population, the luminosity function is well described by a power law with an index between 1.55 and 1.7, only slightly shallower than that found for populations dominated by high-mass X-ray binaries (HMXBs), which suggests that the binary population in NGC 5194 is also dominated by HMXBs. The luminosity function of NGC 5195 is more consistent with a low-mass X-ray binary dominated population.2016ApJ...827...46Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/827/46CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)J/ApJ/764/41 : X-ray binary evolution across cosmic time (Fragos+, 2013)J/MNRAS/419/2095 : HMXBs in nearby galaxies (Mineo+, 2012)J/ApJS/192/10 : Chandra ACIS survey in 383 nearby galaxies. I. (Liu, 2011)J/AJ/136/2782 : Star formation efficiency in nearby galaxies (Leroy+, 2008)J/AJ/136/2563 : HI Nearby Galaxy Survey, THINGS (Walter+, 2008)J/AJ/135/1567 : Bright star clusters in M51 (Hwang+, 2008)J/AJ/133/2559 : Compact radio sources in spiral galaxies. II. (Maddox+, 2007)J/ApJ/664/458 : Spectral fit of ULX sources (Devi+, 2007)J/ApJS/157/59 : Ultraluminous X-ray sources in nearby galaxies (Liu+, 2005)J/ApJ/602/231 : Chandra X-ray point sources in nearby galaxies (Colbert+, 2004)J/ApJ/601/735 : M51 luminous X-ray sources (Terashima+, 2004)J/ApJ/577/31 : PNe in six galaxies (Ciardullo+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/827/46https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/827/46http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/827/46https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/827/46https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/827/46http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/827/46GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/827/46/xraypsc (M51 X-ray point sources fluxes and luminosities (tables 4 and 5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/827/46/xraypsc?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/827/46/xraypsc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/827/46/xraypsc?GETtext/xml+votable180.050000true202.132083347.06736110.0055555555555555566/11026 11027https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/827/46?format=asciiX-raydefaultJ/ApJ/827/46/table6M51 X-ray point source identificationsNotesAdditional notes (5)meta.noterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDObject identifier (XNNN)meta.id;meta.maincharT04? Terashima+ 2004, J/ApJ/601/735 identifiermeta.id.crossintnullablef_T04Flag on T04 (1)meta.codecharK05Kilgard+ 2005ApJS..159..214K identifiermeta.id.crosschar[MCK2007]? Maddox+ 2007, J/AJ/133/2559 identifiermeta.id.crossintnullableMultiMultiwavelength identifier (SDSS objID or FIRST)meta.id.crosscharTypeObject type (2)src.classcharGalGalaxy against which source is projected (A = NGC 5194; B = NGC 5195)meta.codecharLTLong-term variation (3)meta.code;src.varcharMTMedium-term variation (4)meta.code;src.varcharJ/ApJ/827/46/table2Chandra observationsEpochMajor epochtime.epochcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsIDChandra observation IDmeta.id;obsintobsUT date of the observationstime.epoch;obsnullableExp[9.6/190] Exposure timekstime.duration;obs.exposurefloatRollRoll angledeginstr.offsetfloatModeModeinstr.setupcharJ/ApJ/827/46/xraypscM51 X-ray point sources fluxes and luminosities (tables 4 and 5)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDObject identifier (XNNN)meta.id;meta.maincharprimaryOIDDisplay other identifications for this source (link to table 6)meta.ref.urlcharRAJ2000[13] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[46/47] Degree of Declination (J2000)pos.eq.dec;meta.mainPosErr[0/1.5] 1{sigma} statistical position errorarcsecstat.errorfloatExp[10/855] Exposure timekstime.duration;obs.exposurefloatRate[-0.25/41.4] The 0.35-8.0keV band count rate0.001count.s**-1phot.count;em.X-rayfloate_Rate[0.006/0.8] Uncertainty in Rate0.001count.s**-1stat.errorfloatHR1[-3.6/1.6] Hardness ratio, (M-S)/T (1)phot.flux;arith.ratiofloate_HR1[0.01/3] Uncertainty in HR1stat.errorfloatHR2[-2/1] Hardness ratio, (H-M)/T (2)phot.flux;arith.ratiofloate_HR2[0/5] Uncertainty in HR2stat.errorfloatF1[-1.6/216] Chandra 0.35-8keV band flux (3)1e-06count.cm**-2.s**-1phot.flux;em.X-rayfloate_F1[0.02/8] Uncertainty in F1 (3)1e-06count.cm**-2.s**-1stat.errorfloatF2[-3.2/136] Chandra 0.35-1.1keV band flux (3)1e-06count.cm**-2.s**-1phot.flux;em.X-rayfloate_F2[0.003/6] Uncertainty in F2 (3)1e-06count.cm**-2.s**-1stat.errorfloatF3[-0.003/50] Chandra 1.1-2.6keV band flux (3)1e-06count.cm**-2.s**-1phot.flux;em.X-rayfloate_F3[0.001/2.2] Uncertainty in F3 (3)1e-06count.cm**-2.s**-1stat.errorfloatF4[-0.83/33.4] Chandra 2.6-8keV band flux (3)1e-06count.cm**-2.s**-1phot.flux;em.X-rayfloate_F4[0.002/3.5] Uncertainty in F4 (3)1e-06count.cm**-2.s**-1stat.errorfloatF5[-0.5/121] Chandra 0.5-2keV band flux (3)1e-06count.cm**-2.s**-1phot.flux;em.X-rayfloate_F5[0.008/3.4] Uncertainty in F5 (3)1e-06count.cm**-2.s**-1stat.errorfloatF6[-0.03/44.1] Chandra 2-8keV band flux (3)1e-06count.cm**-2.s**-1phot.flux;em.X-rayfloate_F6[0.002/4.2] Uncertainty in F6 (3)1e-06count.cm**-2.s**-1stat.errorfloatLX[-22.7/3149.5] The 0.35-8keV band luminosity (4)1e+29Wphys.luminosity;em.X-rayfloate_LX[0.3/113] Uncertainty in LX (4)1e+29Wstat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlchar