J/ApJ/685/463ivo://CDS.VizieR/J/ApJ/685/463doi:10.26093/cds/vizier.16850463CDSKoenig X.Grindlay J.E.van den Berg M.Laycock S.Zhao P.Hong J.,Schlegel E.M.2016-11-25T08:10:38Z2010-12-23T09:37:21ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomyphotometrystellar-spectral-typessurveysx-ray-sourcesdwarf-starsWe have carried out optical and X-ray spectral analyses on a sample of 136 candidate optical counterparts of X-ray sources found in five Galactic bulge fields included in our Chandra Multiwavelength Plane Survey. We use a combination of optical spectral fitting and quantile X-ray analysis to obtain the hydrogen column density toward each object, and a three-dimensional dust model of the Galaxy to estimate the most probable distance in each case. We present the discovery of a population of stellar coronal emission sources, likely consisting of pre-main-sequence, young main-sequence, and main-sequence stars, as well as a component of active binaries of RS CVn or BY Dra type. We identify one candidate quiescent low-mass X-ray binary with a subgiant companion; we note that this object may also be an RS CVn system. We report the discovery of three new X-ray-detected cataclysmic variables (CVs) in the direction of the Galactic center (at distances <~2kpc). This number is in excess of predictions made with a simple CV model based on a local CV space density of <~10^-5^pc^-3^, and a scale height ~200pc. We discuss several possible reasons for this observed excess.2008ApJ...685..463Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/685/463CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/cb : Cataclysmic Binaries, LMXBs, and related objects (Ritter+, 2010)http://hea-www.harvard.edu/ChaMPlane/ : ChaMPlane survey home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/685/463https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/685/463http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/685/463https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/685/463https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/685/463http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/685/463GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/685/463/table5 (Combined results for 2{sigma} optical matches)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/685/463/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/685/463/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/685/463/table5?GETtext/xml+votable180.050000true253.4299583-39.807250.0055555555555555566/28830 28831 42417 42419 42435https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/685/463?format=asciiInfraredOpticalX-raydefaultJ/ApJ/685/463/table5Combined results for 2{sigma} optical matchesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identificationmeta.id;obs.fieldcharChOPSChOPS identification: JHHMMSS.ss+DDMMSS.s (1)meta.id;meta.maincharSpTypeSpectral type classification (2)src.spTypecharClassSpecial source classification type (3)src.classcharCtsBackground subtracted 0.3-0.8keV net countsctphot.count;em.X-rayintf_Cts[*] * for source with SNR<3meta.codechare_CtsUncertainty in Ctsctstat.errorintl_NHLimit flag on NHmeta.code.errorcharNHHydrogen column density from spectral fit (4)1e+22cm**-2phys.columnDensityfloatf_NH[d] NH estimated from QCCD analysis (5)meta.codechare_NH? Uncertainty in NH1e+21cm**-2stat.errorintnullablel_X/RLimit flag on Fx/FRmeta.notecharX/R? log(Fx/Fr) of unabsorbed 0.5-2keV X-ray to unreddened R band flux (in ergs/cm^2^/s/100nm)phot.flux;arith.ratiofloatnullablee_X/R? Uncertainty in Fx/FRstat.errorfloatnullablel_DistLimit flag on Distmeta.code.errorcharDist? Heliocentric distance; error about 60%kpcpos.distancefloatnullablel_VMAGLimit flag on VMAGmeta.code.errorcharVMAG? Absolute V band magnitudemagphys.magAbs;em.opt.Vfloatnullablee_VMAG? Uncertainty in VMag (in 0.1mag)dmagstat.errorintnullablel_logLxLimit on logLxmeta.code.errorcharlogLx? Log of 0.5-2keV X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatnullablee_logLx? Uncertainty in logLxlog(1e-07W)stat.errorfloatnullableRmagR band magnitudemagphot.mag;em.opt.Rfloate_RmagUncertainty in Rmag (in 0.01mag)cmagstat.error;phot.mag;em.opt.RintNmNumber of optical matches (6)meta.numberintSrchCombined 95% X-ray and optical position error circle (7)arcsecstat.error;spect.dopplerVeloc.opt;em.X-rayfloatoffPositional offset between X-ray and optical positionarcsecpos;arith.difffloatPRnRandom match probability (8)stat.fit.goodnessfloat_RAPositions from ChOPS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from ChOPS name (declination part)degpos.eq.dec;meta.main