J/ApJ/635/214ivo://CDS.VizieR/J/ApJ/635/214doi:10.26093/cds/vizier.16350214CDSEbisawa K.Tsujimoto M.Paizis A.Hamaguchi K.Bamba A.Cutri R.,Kaneda H.Maeda Y.Sato G.Senda A.Ueno M.Yamauchi S.Beckmann V.,Courvoisier T.J.-L.Dubath P.Nishihara E.2008-06-20T12:17:34Z2008-06-20T12:15:17ZCDS support team

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

cds-question@unistra.frx-ray-sourcesinfrared-photometryUsing the Chandra Advanced CCD Imaging Spectrometer Imaging array (ACIS-I), we have carried out a deep hard X-ray observation of the Galactic plane region at (l,b)~(28.5{deg}, 0.0{deg}), where no discrete X-ray source had been reported previously. We have detected 274 new point X-ray sources (4{sigma} confidence), as well as strong Galactic diffuse emission within two partially overlapping ACIS-I fields (~250arcmin^2^ in total). The point-source sensitivity was 3x10^-15^ergs/s/cm^2^ in the hard X-ray band (2-10keV) and 2x10^-16^ergs/s/cm^2^ in the soft band (0.5-2keV). The sum of all the detected point-source fluxes accounts for only 10% of the total X-ray flux in the field of view. Following up the Chandra observation, we have performed a near-infrared (NIR) survey with SofI at ESO/NTT. Almost all the soft X-ray sources have been identified in the NIR, and their spectral types are consistent with main-sequence stars, suggesting that most of them are nearby X-ray-active stars.2005ApJ...635..214Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/635/214CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 2002-)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/635/214https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/635/214http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/635/214https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/635/214https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/635/214http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/635/214GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/635/214/table1 (Detected Source List)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/635/214/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/635/214/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/635/214/table1?GETtext/xml+votable180.050000true280.7157083-3.85311110.005555555555555556Cone search capability for table J/ApJ/635/214/table2 (SOFI NIR source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/635/214/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/635/214/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/635/214/table2?GETtext/xml+votable180.050000true280.78491667-3.909477780.0055555555555555566/30256 302588.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/635/214?format=asciiX-rayInfrareddefaultJ/ApJ/635/214/table1Detected Source ListrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential identification number (1)meta.id;meta.mainintprimaryf_Seq[TE] Flag on Seq (2)meta.codecharAOAnnouncement of Opportunity roundmeta.notecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainePosPositional errorarcsecstat.errorfloatSigTotal band {sigma} significancestat.fit.goodnessfloatSigSSoft band {sigma} significancestat.fit.goodnessfloatSigHHard band {sigma} significancestat.fit.goodnessfloatCtTotal band normalized counts1e-05count.s**-1phot.count;em.X-rayfloatCtSSoft band normalized counts1e-05count.s**-1phot.count;em.X-rayfloatCtHHard band normalized counts1e-05count.s**-1phot.count;em.X-rayfloatHRHardness ratio, (H-S)/(H+S)phot.flux;arith.ratiofloate_HRError in HRstat.errorfloatFSoftSoft band (0.5-2keV) flux (3)mW.m**-2phot.fluxfloatFHardHard band (2-10keV) flux (3)mW.m**-2phot.flux;em.X-ray.mediumfloatNIRIDNear-IR counterpart identification (4)meta.idcharSep? Near-IR counterpart separationarcsecpos.angDistancefloatnullableJmag? SOFI or 2MASS J band magnitude (5)magphot.mag;em.IR.JfloatnullableHmag? SOFI or 2MASS H band magnitude (5)magphot.mag;em.IR.HfloatnullableKsmag? SOFI or 2MASS Ks band magnitude (5)magphot.mag;em.IR.KfloatnullableNIRNear-IR sources, from table2 (SOFI) or 2MASSmeta.ref.urlcharJ/ApJ/635/214/table2SOFI NIR source catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSOFISOFI NIR star identification number (1)meta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainindexedDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainindexedJmag? The J band magnitude (2)magphot.mag;em.IR.JfloatnullableHmag? The H band magnitude (2)magphot.mag;em.IR.HfloatnullableKmag? The K_s_ band magnitude (2)magphot.mag;em.IR.Kfloatnullable2MASS2MASS Identification name (within 0.5")meta.idcharSeq? Chandra identification number (within 1") (3)meta.idintnullable