J/ApJ/758/15ivo://CDS.VizieR/J/ApJ/758/15doi:10.26093/cds/vizier.17580015CDSBinder B.Williams B.F.Eracleous M.Gaetz T.J.Plucinsky P.P.,Skillman E.D.Dalcanton J.J.Anderson S.F.Weisz D.R.Kong A.K.H.2017-07-03T14:26:52Z2014-07-09T12:44:44ZCDS support team

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

cds-question@unistra.frx-ray-sourcesgalaxiesWe present the source catalog of a new Chandra ACIS-I observation of NGC 300 obtained as part of the Chandra Local Volume Survey. Our 63ks exposure covers ~88% of the D_25_ isophote (R{approx}6.3kpc) and yields a catalog of 95 X-ray point sources detected at high significance to a limiting unabsorbed 0.35-8 keV luminosity of ~10^36^erg/s. Sources were cross-correlated with a previous XMM-Newton catalog, and we find 75 "X-ray transient candidate" sources that were detected by one observatory, but not the other. We derive an X-ray scale length of 1.7+/-0.2kpc and a recent star formation rate of 0.12M_{sun}_/yr in excellent agreement with optical observations. Deep, multi-color imaging from the Hubble Space Telescope, covering ~32% of our Chandra field, was used to search for optical counterparts to the X-ray sources, and we have developed a new source classification scheme to determine which sources are likely X-ray binaries, supernova remnants, and background active galactic nucleus candidates. Finally, we present the X-ray luminosity functions (XLFs) at different X-ray energies, and we find the total NGC 300 X-ray point-source population to be consistent with other late-type galaxies hosting young stellar populations (<~50Myr). We find that XLF of sources associated with older stellar populations has a steeper slope than the XLF of X-ray sources coinciding with young stellar populations, consistent with theoretical predictions.2012ApJ...758...15Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/758/15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)B/hst : HST Archived Exposures Catalog (STScI, 2007)J/ApJ/746/54 : Chandra X-ray observations of SDSS-DR5 QSOs (Gibson+, 2012)J/ApJS/193/31 : M33 Chandra ACIS survey: final catalog (Tullmann+, 2011)J/ApJS/187/495 : SNRs in M33 from optical and X-ray (Long+, 2010)J/A+A/497/635 : XMM-Newton survey in COSMOS field (Cappelluti+, 2009)J/A+A/493/339 : XMM-Newton serendipitous Survey. V. (Watson+, 2009)J/ApJS/174/366 : Chandra ACIS survey of M33 (ChaSeM33) (Plucinsky+, 2008)J/MNRAS/383/330 : Chandra Small Magellanic Cloud Wing Survey (McGowan+, 2008)J/ApJ/658/1006 : Radial profiles for 161 face-on spirals (Munoz-Mateos+, 2007)J/MNRAS/356/568 : Deep Chandra survey of the Groth Strip (Nandra+, 2005)J/A+A/443/103 : X-ray properties of NGC 300. I. (Carpano+, 2005)J/ApJ/602/231 : Chandra point sources in nearby galaxies (Colbert+, 2004)J/ApJ/577/738 : M31 Chandra X-ray point sources (Kong+, 2002)J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/758/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/758/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/758/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/758/15https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/758/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/758/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/758/15/xray (NGC 300 X-ray point sources properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/758/15/xray?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/758/15/xray?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/758/15/xray?GETtext/xml+votable180.050000true13.54993694-37.664408060.0055555555555555566/35536 355382.0401237512456292e-19 4.2441532724171825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/758/15?format=asciiX-raydefaultJ/ApJ/758/15/xrayNGC 300 X-ray point sources propertiesthetaOff-axis angleinstr.offsetfloatl_logP1Limit flag on logP1meta.code.errorcharSeq[1/95] Running sequence numbermeta.id;meta.mainintprimaryOptNumber and link to optical counterpart(s) in table 16meta.numberintnullableIDSource identifier (HHMMSS.ss+DDMMSS.s; J2000)meta.idcharRAJ2000[13.5/13.9] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-37.9/-37.4] Declination (J2000)degpos.eq.dec;meta.mainePos[0.03/1.9] Positional error (1)arcsecstat.error;posfloatTexpSum of mean exposure map value in source regions.cm**2stat.value;stat.meandoubleRsrcAverage radius of source extraction region (2)pixstat.fit.paramfloatlogP1Log Poisson probability 0.5-8 keV band is not a source (3)stat.fit.goodnessfloatl_logP2Limit flag on logP2meta.code.errorcharlogP2Log Poisson probability 0.5-2 keV band is not a source (3)stat.fit.goodnessfloatl_logP3Limit flag on logP3meta.code.errorcharlogP3Log Poisson probability 2-8 keV band is not a source (3)stat.fit.goodnessfloatl_logP4Limit flag on logP4meta.code.errorcharlogP4Log Poisson probability 0.35-8 keV band is not a source (3)stat.fit.goodnessfloatl_logP5Limit flag on logP5meta.code.errorcharlogP5Log Poisson probability 0.35-1.1 keV band is not a source (3)stat.fit.goodnessfloatl_logP6Limit flag on logP6meta.code.errorcharlogP6Log Poisson probability 1.1-2.6 keV band is not a source (3)stat.fit.goodnessfloatl_logP7Limit flag on logP7meta.code.errorcharlogP7Log Poisson probability 2.6-8 keV band is not a source (3)stat.fit.goodnessfloatl_logP8Limit flag on logP8meta.code.errorcharlogP8Log Poisson probability 0.35-2 keV band is not a source (3)stat.fit.goodnessfloatl_logNC1Limit flag on logNC1meta.code.errorcharlogNC1[3.3/1933] log of 0.5-8 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC1? Upper limit uncertainty in logNC1log(count)stat.error;stat.maxfloatnullablee_logNC1? Lower limit uncertainty in logNC1log(count)stat.errorfloatnullablel_logNC2Limit flag on logNC2meta.code.errorcharlogNC2[0.9/1549] log of 0.5-2 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC2? Upper limit uncertainty in logNC2log(count)stat.error;stat.maxfloatnullablee_logNC2? Lower limit uncertainty in logNC2log(count)stat.errorfloatnullablel_logNC3Limit flag on logNC3meta.code.errorcharlogNC3[0.9/385] log of 2-8 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC3? Upper limit uncertainty in logNC3log(count)stat.error;stat.maxfloatnullablee_logNC3? Lower limit uncertainty in logNC3log(count)stat.errorfloatnullablel_logNC4Limit flag on logNC4meta.code.errorcharlogNC4[3.3/1963] log of 0.35-8 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC4? Upper limit uncertainty in logNC4log(count)stat.error;stat.maxfloatnullablee_logNC4? Lower limit uncertainty in logNC4log(count)stat.errorfloatnullablel_logNC5Limit flag on logNC5meta.code.errorcharlogNC5[0.7/740] log of 0.35-1.1 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC5? Upper limit uncertainty in logNC5log(count)stat.error;stat.maxfloatnullablee_logNC5? Lower limit uncertainty in logNC5log(count)stat.errorfloatnullablel_logNC6Limit flag on logNC6meta.code.errorcharlogNC6[0.7/972] log of 1.1-2.6 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC6? Upper limit uncertainty in logNC6log(count)stat.error;stat.maxfloatnullablee_logNC6? Lower limit uncertainty in logNC6log(count)stat.errorfloatnullablel_logNC7Limit flag on logNC7meta.code.errorcharlogNC7[1/252] log of 2.6-8 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC7? Upper limit uncertainty in logNC7log(count)stat.error;stat.maxfloatnullablee_logNC7? Lower limit uncertainty in logNC7log(count)stat.errorfloatnullablel_logNC8Limit flag on logNC8meta.code.errorcharlogNC8[0.9/1579] log of 0.35-2 keV band net countslog(count)phot.count;em.X-rayfloatE_logNC8? Upper limit uncertainty in logNC8log(count)stat.error;stat.maxfloatnullablee_logNC8? Lower limit uncertainty in logNC8log(count)stat.errorfloatnullablelogF1? log of 0.5-8 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullablelogF2? log of 0.5-2 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullablelogF3? log of 2-8 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullablelogF4? log of 0.35-8 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullablelogF5? log of 0.35-1.1 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullablelogF6? log of 1.1-2.6 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullablelogF7? log of 2.6-8 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullablelogF8? log of 0.35-2 keV band photon fluxlog(count.cm**-2.s**-1)phot.flux;em.X-rayfloatnullableJ/ApJ/758/15/table16Optical counterparts to Chandra X-ray sourcesf_Sep[c] c: no optical counterpart detectedmeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/95] X-ray source numbermeta.id;meta.mainintm_SeqMultiple optical counterpart candidate indication for Seqmeta.code.multipcharSrcType of source: G=Galaxy; PS=point source (see section 4.3.1 for this X-ray source)src.classcharSep[0/1.5]? The positional offset from the Chandra X-ray source locationarcsecpos;arith.difffloatnullableF435W? HST F435W magnitudemagphot.mag;em.opt.Bfloatnullablee_F435W? F435W uncertaintymagstat.errorfloatnullableF475W? HST F475W magnitudemagphot.mag;em.opt.Bfloatnullablee_F475W? F475W uncertaintymagstat.errorfloatnullableF555W? HST F555W magnitudemagphot.mag;em.opt.Vfloatnullablee_F555W? F555W uncertaintymagstat.errorfloatnullableF606W? HST F606W magnitudemagphot.mag;em.opt.Rfloatnullablee_F606W? F606W uncertaintymagstat.errorfloatnullableF814W? HST F814W magnitudemagphot.mag;em.opt.Ifloatnullablee_F814W? F814W magnitudemagstat.errorfloatnullableF814W2? Second value of F814W magnitudemagphot.mag;em.opt.Ifloatnullablee_F814W2? F814W2 uncertaintymagstat.errorfloatnullableFX2-10keV X-ray flux (1)aW.m**-2phot.flux;em.X-rayfloat[X/V]? log of X-ray to optical flux ratio (2)phot.flux;arith.ratiofloatnullable[X/V]2? Second value of log(Fx/Fv) (2)phot.flux;arith.ratiofloatnullable