J/ApJ/725/480ivo://CDS.VizieR/J/ApJ/725/480doi:10.26093/cds/vizier.17250480CDSWright N.J.Drake J.J.Civano F.2017-06-27T06:37:22Z2012-08-23T08:48:35ZCDS support team

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

cds-question@unistra.frg-starslate-type-starsinfrared-photometryvisible-astronomysloan-photometrystellar-spectral-typesx-ray-sourcessurveysWe present an analysis of the X-ray properties of a sample of solar- and late-type field stars identified in the Chandra Cosmic Evolution Survey (COSMOS), a deep (160ks) and wide (~0.9deg^2^) extragalactic survey. The sample of 60 sources was identified using both morphological and photometric star/galaxy separation methods. We determine X-ray count rates, extract spectra and light curves, and perform spectral fits to determine fluxes and plasma temperatures. Complementary optical and near-IR photometry is also presented and combined with spectroscopy for 48 of the sources to determine spectral types and distances for the sample. We find distances ranging from 30pc to ~12kpc, including a number of the most distant and highly active stellar X-ray sources ever detected. Overall the sample is typically more luminous than the active Sun, representing the high-luminosity end of the disk and halo X-ray luminosity functions. The halo population appears to include both low-activity spectrally hard sources that may be emitting through thermal bremsstrahlung, as well as a number of highly active sources in close binaries.2010ApJ...725..480Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/725/480CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)J/A+A/542/A16 : Radio star forming and AGN X-ray properties (Ranalli+, 2012)J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)J/ApJ/696/1195 : COSMOS AGN spectroscopic survey. I. (Trump+, 2009)J/ApJS/172/383 : AGN candidates in the COSMOS field (Trump+, 2007)J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)http://cosmos.astro.caltech.edu/data : COSMOS online archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/725/480https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/725/480http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/725/480https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/725/480https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/725/480http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/725/480GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/725/480/xstars (X-ray, optical and NIR properties of stellar sources detected in the Chandra COSMOS survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/725/480/xstars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/725/480/xstars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/725/480/xstars?GETtext/xml+votable180.050000true150.20183332.12633330.0055555555555555565/6814 6/272478.650015785639275e-20 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/725/480?format=asciiX-rayOpticalInfrareddefaultJ/ApJ/725/480/xstarsX-ray, optical and NIR properties of stellar sources detected in the Chandra COSMOS surveyCXOCSimbad column added by the CDSmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCIDChandra COSMOS id (Seq number from Cat. J/ApJS/184/158, <CXOC JHHMMSS.s+DDMMSS> in Simbad)meta.id;meta.mainintNctsNet counts in the full (0.5-8keV) bandctphot.count;em.X-rayfloatE_NctsUpper 1{sigma} error on Nctsctstat.error;stat.maxfloate_NctsLower 1{sigma} error on Nctsctstat.errorfloatSigSource detection significancestat.likelihood;obsfloatlogPLog of the probability that the source is a chance coincidence of background events (2)stat.fit.goodnessfloatExpFull exposure time (3)kstime.duration;obs.exposurefloatEmedMedian energy in the full (0.5-8keV) band (4)keVem.energyfloatlogPKSLog of the Kolmogorov-Smirnov probability that the source is not variablestat.fit.goodness;src.varfloatFit[1T/- ] X-ray spectral model fit type (5)stat.weightcharkT? Thermal plasma temperature of model fit (6)keVphys.energy;meta.modelledfloatnullableE_kT? Positive error on kT (6)keVstat.error;stat.maxfloatnullablee_kT? Negative error on kT (6)keVstat.error;phys.energyfloatnullablelogFLog of the X-ray flux in the full band (7)log(mW.m**-2)phot.flux;em.X-rayfloatE_logF? Upper 1{sigma} error on logFlog(mW.m**-2)stat.error;stat.maxfloatnullablee_logF? Lower 1{sigma} error on logFlog(mW.m**-2)stat.errorfloatnullablelogFs? Log of extinction-corrected soft (0.5-2.0keV) X-ray fluxlog(mW.m**-2)phot.flux;em.X-rayfloatnullablelogFh? Log of extinction-corrected hard (2.0-8.0keV) X-ray fluxlog(mW.m**-2)phot.flux;em.X-rayfloatnullableRAJ2000Optical hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Optical degree of declination (J2000)pos.eq.dec;meta.mainumag? SDSS u-band magnitudemagphot.mag;em.opt.Ufloatnullablee_umag? umag uncertaintymagstat.error;phot.mag;em.opt.Ufloatnullablegmag? SDSS g-band magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag? gmag uncertaintymagstat.error;phot.mag;em.opt.Bfloatnullablermag? SDSS r-band magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag? rmag uncertaintymagstat.error;phot.mag;em.opt.Rfloatnullableimag? SDSS i-band magnitudemagphot.mag;em.opt.Ifloatnullablee_imag? imag uncertaintymagstat.error;phot.mag;em.opt.Ifloatnullablezmag? SDSS z-band magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag? zmag uncertaintymagstat.error;phot.mag;em.opt.IfloatnullableJmag2MASS J-band magnitudemagphot.mag;em.IR.Jfloate_JmagJmag uncertaintymagstat.error;phot.mag;em.IR.JfloatHmag? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Hmag uncertaintymagstat.error;phot.mag;em.IR.HfloatnullableKsmag2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloate_KsmagKsmag uncertaintymagstat.error;phot.mag;em.IR.KfloatSpTMK spectral typesrc.spTypecharq_SpT[*] *: low-quality spectra, accurate to +/-2 subtypesmeta.code.qualcharr_SpTOrigin of spectral classification (8)meta.ref;pos.framecharDistEstimated distance based on spectral typekpcpos.distance;pos.heliocentricfloatxcCross-match with other COSMOS catalogs within 1"meta.ref.urlintnullableSloanDisplay the online SDSS data for this starmeta.ref.urlchar2MDisplay the 2MASS (Cat II/246) data within 3" (if Ksmag<15)meta.ref.urlchar