J/AJ/135/693ivo://CDS.VizieR/J/AJ/135/693doi:10.26093/cds/vizier.51350693CDSWolk S.J.Spitzbart B.D.Bourke T.L.Gutermuth R.A.Vigil M.,Comeron F.2017-06-28T06:57:52Z2010-07-21T13:55:53ZCDS support team

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

cds-question@unistra.frh-ii-regionsinfrared-photometryx-ray-sourcesWe report on the results of an approximately 90ks Chandra observation of a complex region that hosts multiple sites of recent and active star formation in ARA OB1a. The field is centered on the embedded cluster RCW 108-IR and includes a large portion of the open cluster NGC 6193. We detect over 420 X-ray sources in the field and combined these data with deep near-IR, Spitzer/IRAC and Midcourse Space Experiment (MSX) mid-IR data. We find about 360 of the X-ray sources have near-IR counterparts. We divide the region into five parts based on the X-ray point source characteristics and extended 8um emission. The most clearly defined regions are the central region, identified by embedded sources with high luminosities in both the near-IR and X-ray as well as high X-ray temperatures (~3keV), and the eastern region, identified by low extinction and ~1keV X-ray temperatures. The cluster members range in X-ray luminosity from 10^29^ to 10^33^erg/s. Over 18% of the cluster members with over 100 counts exhibit flares. All sources with over 350 counts are variable. Overall about 10% (16% in RCW 108-IR) appear to have optically thick disks as derived from their position in the (J-H), (H-K) diagram. The disk fraction becomes much higher when IRAC data are employed. We fit the bulk of the X-ray spectra as absorbed Raymond-Smith-type plasmas, and find that the column to the RCW 108-IR members varies from 10^21^ to 10^23^cm^-2^. We find that the field contains 41 candidate O or B stars, and estimate that the total number of pre-main-sequence stars in the field is about 1600+/-200.2008AJ....135..693Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/135/693CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/473/149 : Sources in IRAS 16362-4845 cluster photometry (Comeron+, 2007)J/AJ/132/1100 : X-ray and IR sources in RCW 38 (Wolk+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/135/693https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/135/693http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/135/693https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/135/693https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/135/693http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/135/693GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/135/693/sources (Bright (X-ray sources in RCW 108 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/693/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/693/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/693/sources?GETtext/xml+votable180.050000true250.15266667-48.871491670.005555555555555556Cone search capability for table J/AJ/135/693/table10 (Near-IR observations of X-ray sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/693/table10?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/693/table10?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/693/table10?GETtext/xml+votable180.050000true250.1529167-48.87111110.0055555555555555566/42212 42213https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/135/693?format=asciiX-rayInfrareddefaultJ/AJ/135/693/sourcesBright (X-ray sources in RCW 108 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSrcRunning source number ([WSB2008] in Simbad)meta.id;meta.mainintprimaryCXOWSBOfficial IAU style identification (HHMMSS.s+DDMMSS.s)meta.idcharRAJ2000X-ray centroid hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000X-ray centroid degree of Declination (J2000)pos.eq.dec;meta.mainOffOff axis anglearcsecinstr.offsetfloatRcts? Raw counts (only for table1)ctphot.count;em.X-rayfloatnullableSsig? Source signal (only for table2)ctphot.count;em.X-rayfloatnullableNctsNet countsctphot.count;em.X-rayfloatVar[1/7]? Number of Bayesian block >95% confidence required to describe the lightcurve (table1) (1)meta.code;src.varintnullableIRSimbad column added by the CDSmeta.ref.urlcharJ/AJ/135/693/XfitX-ray quartiles and model fittingrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSrcRunning source numbermeta.id;meta.mainintQ25? The bottom (25%) quartile valuestat.fit.paramfloatnullablee_Q25? Error in Q25stat.fit.paramfloatnullablem? The median quartile (=Q50)stat.fit.paramfloatnullablee_m? Error in mstat.errorfloatnullableQ75? The top (75%) quartile valuestat.fit.paramfloatnullablee_Q75? Error in Q75stat.fit.paramfloatnullablelog(m/(1-m))? Log of the m/(1-m) valuestat.fit.paramfloatnullable3*Q25/Q75? Three times Q25 divided by Q75stat.fit.paramfloatnullableLocLocation (RCW 108-IR/East/West/North/South)meta.notecharchi2The {chi}^2^ value (1)stat.fit.chi2floatNHModel hydrogen column density1e+22cm**-2phys.columnDensity;meta.modelledfloate_NH? Error in NH1e+22cm**-2stat.errorfloatnullablel_kTLimit flag on kTmeta.code.error;phys.energycharkTModel temperaturekeVphys.temperaturefloate_kT? Error in kTkeVstat.error;phys.energyfloatnullableAFluxAbsorbed fluxlog(mW.m**-2)phot.flux;em.X-rayfloatUFluxUnabsorbed fluxlog(mW.m**-2)phot.flux;em.X-rayfloatLogLxLog of X-ray luminositylog(1e-07W)phys.luminosity;em.X-rayfloatJ/AJ/135/693/table10Near-IR observations of X-ray sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLocLocation (RCW 108-IR/East/West/North/South)meta.notecharSrcRunning source numbermeta.id;meta.mainintf_Src[a] double source (1)meta.codecharRAJ2000IR source hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000IR source degree of Declination (J2000)pos.eq.dec;meta.mainOffset? Offset from X-ray centroid positionarcsecpos;arith.difffloatnullableOffOff axis anglearcsecinstr.offsetfloatJmag? The J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Error in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? The H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Error in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag? The K_S_ band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? Error in Kmagmagstat.error;phot.mag;em.IR.KfloatnullableQmag? Infrared excess, reddening free quantity (2)magphot.color.reddFreefloatnullableAV? The V band extinctionmagphys.absorption;em.opt.VfloatnullableModelStellar model used (Disk, M star or HMS = Higher mass star)instr.setup;meta.modelledcharFlagSource flag (4)meta.code.errorcharJ/AJ/135/693/table11IRAC detections of X-ray sources in the RCW 108 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLocLocation (RCW 108-IR/East/West/North/South)meta.notecharSrcRunning source numbermeta.id;meta.mainintOffsetOffset from X-ray centroid positionarcsecpos;arith.difffloatOffOff axis anglearcsecinstr.offsetchar3.6mag? Spitzer/IRAC 3.6 micron band magnitudemagphot.mag;em.IR.3-4umfloatnullable4.5mag? Spitzer/IRAC 4.5 micron band magnitudemagphot.mag;em.IR.4-8umfloatnullable5.8mag? Spitzer/IRAC 5.8 micron band magnitudemagphot.flux.density;em.IR.4-8umfloatnullable8.0mag? Spitzer/IRAC 8.0 micron band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_3.6mag? Error in 3.6magmagstat.errorfloatnullablee_4.5mag? Error in 4.5magmagstat.errorfloatnullablee_5.8mag? Error in 5.8magmagstat.errorfloatnullablee_8.0mag? Error in 8.0magmagstat.errorfloatnullableClassIR evolution class (I=protostars, II=PMS with disk, III=diskless PMS star)meta.code.classchar