J/ApJ/614/267ivo://CDS.VizieR/J/ApJ/614/267doi:10.26093/cds/vizier.16140267CDSFeigelson E.D.Lawson W.A.2017-07-11T13:09:12Z2008-10-19T12:39:47ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsx-ray-sourcesinfrared-photometrySensitive X-ray imaging surveys provide a new and effective tool to establish the census of pre-main-sequence (PMS) stars in nearby young stellar clusters. We report here a deep Chandra X-Ray Observatory observation of PMS stars in the Chamaeleon I North cloud, achieving a limiting luminosity of log L_t_~27ergs/s (0.5-8keV band) in a 0.8x0.8pc^2^ region. Of the 107 X-ray sources, 37 are associated with Galactic stars of which 27 are previously recognized cloud members.2004ApJ...614..267Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/614/267CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/284 : The USNO-B1.0 Catalog (Monet+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)B/denis : The DENIS database (DENIS Consortium, 2005)J/AJ/124/1001 : JHKs photometry of Cha I variables (Carpenter, 2002)J/AJ/121/2673 : 3{mu}m survey of the Chamaeleon I dark cloud (Kenyon+, 2001)J/AJ/121/974 : JHK photometry in Cha I (Gomez+, 2001)J/A+AS/114/109 : Cha X-ray sources + optical identifications (Alcala+ 1995)J/A+A/423/1029 : XMM-Newton obs, in Cha I South (Stelzer+, 2004)J/A+A/416/555 : Brown Dwarfs in ChaI Dark Cloud (Lopez-Marti+ 2004)J/A+A/357/219 : ISOCAM observations in Cha I. (Persi+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/614/267https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/614/267http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/614/267https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/614/267https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/614/267http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/614/267GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/614/267/table1 (Chandra sources and counterparts in Cha I North)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/614/267/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/614/267/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/614/267/table1?GETtext/xml+votable180.050000true166.806667-76.6486670.0055555555555555566/369578.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/614/267?format=asciiX-rayInfrareddefaultJ/ApJ/614/267/table1Chandra sources and counterparts in Cha I NorthrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_[FL2004]Simbad column added by the CDSmeta.ref.urlchar[FL2004]Source designationmeta.id;meta.mainintprimaryf_[FL2004][a] Flag on [FL2004] (G1)meta.codecharRAJ2000Hour of Right Ascension (J2000.0) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000.0) (1)pos.eq.dec;meta.mainthetaOff-axis anglearcmininstr.offsetfloatcountsBackground-subtracted extracted counts (2)ctphot.count;em.X-rayintCHRX? Cross-reference to earlier ROSAT sources (Feigelson et al., 1993ApJ...416..623F)meta.idintnullableStarStellar counterpart (3)meta.id.assoccharX-IR? Offset between Chandra and 2MASS positionsarcsecmeta.idfloatnullableJ/ApJ/614/267/starsCombined table from original tablesPropProperty flag (1)meta.notecharlogNHHydrogen column densitylog(cm**-2)phys.columnDensityfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[FL2004]Source identificationmeta.id;meta.mainintf_[FL2004][a] Flag on [FL2004] (G1)meta.codecharONameOther namemeta.idcharCXC_X_ events (1)ctphot.count;em.X-rayintBXB_X_ values, background counts scaled to the extraction region (1)ctinstr.background;obs.fieldintVar[a-c] Variability indicator (1) (2)meta.code;src.varcharu_logNHUncertainty flag on logNHmeta.code.errorcharkT1Plasma energykeVphys.temperaturefloatu_kT1Uncertainty flag on kT1meta.code.errorchare_kT1? Error in kT1keVstat.errorfloatnullablekT2? Plasma energykeVphys.temperaturefloatnullablelogLsLog of X-ray luminosity L_s_ in the soft 0.5-2keV band (3)log(1e-07W)phys.luminosity;em.X-rayfloatlogLtLog of X-ray luminosity L_t_ in the total 0.5-8keV band (3)log(1e-07W)phys.luminosity;em.X-rayfloatlogLc? Absorption-corrected luminosity L_c_log(1e-07W)phys.luminosity;em.X-rayfloatnullableClassClassification type (2)src.classcharRmag? USNO-B1.0 (Cat. I/284) R magnitudemagphot.mag;em.opt.RfloatnullableImag? i or I magnitude (3)magphot.mag;em.opt.IfloatnullableJmag2MASS J magnitudemagphot.mag;em.IR.Jfloatu_JmagUncertainty flag on Jmagmeta.code.errorcharHmag2MASS H magnitudemagphot.mag;em.IR.Hfloatu_HmagUncertainty flag on Hmagmeta.code.errorcharl_KmagLimit flag on Kmagmeta.code.errorcharKmag2MASS K magnitudemagphot.mag;em.IR.Kfloatu_KmagUncertainty flag on Kmagmeta.code.errorcharm6.7? 6.7{mu}m band magnitude (4)magphot.flux.density;em.IR.8-15umfloatnullablem14.3? 14.3{mu}m band magnitude (4)magphot.flux.density;em.IR.8-15umfloatnullableSpTypeSpectral typesrc.spTypecharLbol? Bolometric luminositysolLumphys.luminosityfloatnullableu_Lbol[?] Uncertainty flag on Lbolmeta.code.errorcharMass? MasssolMassphys.massfloatnullableu_MassUncertainty flag on Massmeta.code.error;phys.masscharl_AgeLimit flag on Agemeta.code.error;time.agecharAge? AgeMyrtime.ageintnullable