J/AJ/154/87ivo://CDS.VizieR/J/AJ/154/87doi:10.26093/cds/vizier.51540087CDSKuhn M.A.Medina N.Getman K.V.Feigelson E.D.Gromadzki M.,Borissova J.Kurtev R.2020-05-04T13:52:32Z2018-08-31T06:56:52ZCDS 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-sourcesvariable-starsob-starsstellar-spectral-typesinfrared-photometryvisible-astronomyWide-band photometrystellar-populationsNGC 6231 is a young cluster (age ~2-7 Myr) dominating the Sco OB1 association (distance ~1.59 kpc) with ~100 O and B stars and a large pre-main-sequence stellar population. We combine a reanalysis of archival Chandra X-ray data with multiepoch near-infrared (NIR) photometry from the VISTA Variables in the Via Lactea (VVV) survey and published optical catalogs to obtain a catalog of 2148 probable cluster members. This catalog is 70% larger than previous censuses of probable cluster members in NGC 6231. It includes many low-mass stars detected in the NIR but not in the optical and some B stars without previously noted X-ray counterparts. In addition, we identify 295 NIR variables, about half of which are expected to be pre-main-sequence stars. With the more complete sample, we estimate a total population in the Chandra field of 5700-7500 cluster members down to 0.08 M_{sun}_ (assuming a universal initial mass function) with a completeness limit at 0.5 M_{sun}_. A decrease in stellar X-ray luminosities is noted relative to other younger clusters. However, within the cluster, there is little variation in the distribution of X-ray luminosities for ages less than 5 Myr. The X-ray spectral hardness for B stars may be useful for distinguishing between early-B stars with X-rays generated in stellar winds and B-star systems with X-rays from a pre-main-sequence companion (>35% of B stars). A small fraction of catalog members have unusually high X-ray median energies or reddened NIR colors, which might be explained by absorption from thick or edge-on disks or being background field stars.2017AJ....154...87Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/154/87CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/337 : VISTA Variables in the Via Lactea Survey DR1 (Saito+, 2012)J/A+A/325/167 : Geneva photometry in NGC 6231 (Raboud+ 1997)J/AJ/115/734 : NGC 6231 UBVRI and H{alpha} photometry (Sung+ 1998)J/A+AS/137/233 : UBVI imaging photometry of NGC 6231 (Baume+, 1999)J/A+A/454/1047 : XMM view of NGC 6231 open cluster (Sana+, 2006)J/MNRAS/372/661 : XMM view of NGC 6231: OB stars (Sana+, 2006)J/MNRAS/386/447 : RV catalogue of O-type stars in NGC 6231 (Sana+, 2008)J/ApJ/708/1760 : Flux estimations of faint X-ray sources (Getman+, 2010)J/AJ/145/37 : UBVI and H{alpha} CCD photometry of NGC 6231 (Sung+, 2013)J/ApJS/209/27 : MYStIX: the Chandra X-ray sources (Kuhn+, 2013)J/MNRAS/440/2036 : VPHAS+ survey synthetic colours (Drew+, 2014)J/A+A/596/A82 : X-ray study of the young cluster NGC6231 (Damiani+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/154/87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/154/87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/154/87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/154/87https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/154/87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/154/87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/154/87/table1 (*X-Ray Sources and Properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/87/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/87/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/87/table1?GETtext/xml+votable180.050000true253.30118694-41.7925350.005555555555555556Cone search capability for table J/AJ/154/87/table3 (NGC 6231 CXOVVV Probable Cluster Member Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/87/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/87/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/87/table3?GETtext/xml+votable180.050000true253.28408306-41.786638890.005555555555555556Cone search capability for table J/AJ/154/87/table4 (VVV K_s_-band Variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/87/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/87/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/87/table4?GETtext/xml+votable180.050000true252.4584167-41.68928890.005555555555555556Cone search capability for table J/AJ/154/87/table5 (Chandra X-ray properties of OB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/87/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/87/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/87/table5?GETtext/xml+votable180.050000true253.2752578-41.88851110.0055555555555555565/10598 6/42381 42383 42405 42416 424172.0616683193919197e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/154/87?format=asciiX-rayOpticalInfrareddefaultJ/AJ/154/87/table1*X-Ray Sources and PropertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOUX-ray source name; CXOU J(HHMMSS.ss+DDMMSS.s) (Name)meta.id;meta.maincharLabelSource name generated by ACIS Extract (Label) (1)meta.id;obscharRAJ2000Right Ascension in decimal degrees (J2000) (RAdeg)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (DEdeg)degpos.eq.dec;meta.mainePos1{sigma} error circle around (RAdeg, DEdeg) (PosErr)arcsecstat.errordoublePosTypeAlgorithm used to estimate position (Broos et al. 2010ApJ...714.1582B, Section 7.1) (PosType)meta.id;stat.fitcharno-mSmallest of no-t, no-s and no-h (ProbNoSrc_min) (2)stat.fit.goodnessdoubleno-tp-value for no-source hypothesis in the total (0.5-8 keV) energy band (ProbNoSrc_t) (2)stat.fit.goodnessdoubleno-s? p-value for no-source hypothesis in the soft (0.5-2 keV) energy band (ProbNoSrc_s) (2)stat.fit.goodnessdoublenullableno-h? p-value for no-source hypothesis in the hard (2-8 keV) energy band (ProbNoSrc_h) (2)stat.fit.goodnessdoublenullableKS-s? Smallest p-value for the one-sample Kolmogorov-Smirnov statistic under the no-variability null hypothesis within a single observation (ProbKS_single) (3)stat.fit.goodnessdoublenullableKS-m? Smallest p-value for the one-sample Kolmogorov-Smirnov statistic under the no-variability null hypothesis over merged observations (ProbKS_merge) (3)stat.fit.goodnessdoublenullableExpNom[44384.3/120591] Total exposure time in merged observations (ExposureTimeNominal)stime.duration;obsdoubleExpFracFraction of ExpNom that source was observed (ExposureFraction) (4)time.expodoubleNobs[1/2] Total number of observations extracted (NumObservations)meta.numberintNph[1/2] Number of observations merged to estimate photometry properties (NumMerged)meta.numberintFdis[0/0.35725] Fraction of exposure discarded in merge (MergeBias)time.expodoubletheta-mSmallest off-axis angle for merged observations (Theta_Lo)arcmininstr.offsetdoublethetaAverage off-axis angle {theta} for merged observations (Theta)arcmininstr.offset;stat.meandoubletheta-MLargest off-axis angle for merged observations (Theta_Hi)arcmininstr.offset;stat.maxdoublePSFfAverage PSF fraction (at 1.5 keV) for merged observations (PsfFraction)instr.det.psfdoubleArea[1.16494/2098.42] Average aperture area for merged observations (in units of (0.492arcsec)^2^) (SrcArea)phys.area;instrdoubleaglow[0/0.5]? Suspected afterglow fraction (AfterglowFraction) (5)stat.fit.paramdoublenullableOct-t[3/5448] Observed 0.5-8 keV counts in merged apertures (SrcCounts_t)ctphot.count;em.X-rayintOct-s[0/4787] Observed 0.5-2 keV counts in merged apertures (SrcCounts_s)ctphot.count;em.X-rayintOct-h[0/661] Observed 2-8 keV counts in merged apertures (SrcCounts_h)ctphot.count;em.X-rayintbgSclScaling of the background extraction (Broos et al. 2010ApJ...714.1582B, Section 5.4) (BkgScaling)instr.backgrounddoublebgct-t[0/1508] Observed 0.5-8 keV counts in merged background regions (BkgCounts_t)ctinstr.background;em.X-ray.mediumintbgct-s[0/1442] Observed 0.5-2 keV counts in merged background regions (BkgCounts_s)ctinstr.background;em.X-ray.softintbgct-h[0/264] Observed 2-8 keV counts in merged background regions (BkgCounts_h)ctinstr.background;em.X-ray.mediumintNct-t[1.64829/5447] Net 0.5-8 keV counts in merged apertures (NetCounts_t)ctphot.count;em.X-raydoubleNct-s[-4.91924/4786.09277] Net 0.5-2 keV counts in merged apertures (NetCounts_s)ctphot.count;em.X-raydoubleNct-h[-6.25827/660.906] Net 2-8 keV counts in merged apertures (NetCounts_h)ctphot.count;em.X-raydoubleb_Nct-t[0/5373.19] 1{sigma} lower bound on Nct-t (NetCounts_Lo_t) (6)ctphot.count;em.X-ray;stat.mindoubleB_Nct-t[3.62988/5521.55] 1{sigma} upper bound on Nct-t (NetCounts_Hi_t) (6)ctphot.count;em.X-ray;stat.maxdoubleb_Nct-s[0/4716.9]? 1{sigma} lower bound on Nct-s (NetCounts_Lo_s) (6)ctphot.count;em.X-ray;stat.mindoublenullableB_Nct-s[1.14885/4855.97021] 1{sigma} upper bound on Nct-s (NetCounts_Hi_s) (6)ctphot.count;em.X-ray;stat.maxdoubleb_Nct-h[0/635.196]? 1{sigma} lower bound on Nct-h (NetCounts_Lo_h) (6)ctphot.count;em.X-ray;stat.mindoublenullableB_Nct-h[1.13821/686.873] 1{sigma} upper bound on Nct-h (NetCounts_Hi_h) (6)ctphot.count;em.X-ray;stat.maxdoubleArea-t[29.1045/241.377] Mean 0.5-8 keV ARF value (MeanEffectiveArea_t) (7)cm**2.count.ph**-1phys.area;instrdoubleArea-s[40.9269/335.0584] Mean 0.5-2 keV ARF value (MeanEffectiveArea_s) (7)cm**2.count.ph**-1phys.area;instrdoubleArea-h[26.1417/217.904] Mean 2-8 keV ARF value (MeanEffectiveArea_h)(7)cm**2.count.ph**-1phys.area;instrdoubleE-t[0.6351/6.4897] Median 0.5-8 keV energy, observed spectrum (MedianEnergy_t) (8)keVem.energyfloatE-s[0.5037/1.9929]? Median 0.5-2 keV energy, observed spectrum (MedianEnergy_s) (8)keVem.energyfloatnullableE-h[2.0075/7.9643]? Median 2-8 keV energy, observed spectrum (MedianEnergy_h) (8)keVem.energyfloatnullablelogF-t[-7.21629/-3.36091] Log incident 0.5-8 keV photon flux (PhotonFlux_t) (9)log(ph.cm**-2.s**-1)phot.flux;em.X-raydoublelogF-s[-9.45495/-3.56744]? Log incident 0.5-2 keV photon flux (PhotonFlux_s) (9)log(ph.cm**-2.s**-1)phot.flux;em.X-raydoublenullablelogF-h[-11.136/-4.22939]? Log incident 2-8 keV photon flux (PhotonFlux_h) (9)log(ph.cm**-2.s**-1)phot.flux;em.X-raydoublenullableFlux-h? 2-8 keV X-ray flux (in erg/cm^2^/s) (FH) (10)mW.m**-2phot.flux;em.X-raydoublenullableFlxc-h? Absorption-corrected 2-8 keV X-ray flux (in erg/cm^2^/s) (FHC) (10)mW.m**-2phot.flux;em.X-raydoublenullablee_Flxc-h? 1{sigma} statistical uncertainty on Flxc-h (in erg/cm^2^/s) (SF_HC_STAT) (10)mW.m**-2stat.errordoublenullables_Flxc-h? 1{sigma} systematic uncertainty on Flxc-h (in erg/cm^2^/s) (SF_HC_SYST) (10)mW.m**-2stat.error.sysdoublenullableFlux-t? 0.5-8 keV X-ray flux (in erg/cm^2^/s) (FT) (10)mW.m**-2phot.flux;em.X-raydoublenullableFlxc-t? Absorption-corrected 0.5-8 keV X-ray flux (in erg/cm^2^/s) (FTC) (10)mW.m**-2phot.flux;em.X-raydoublenullablee_Flxc-t? 1{sigma} statistical uncertainty on Flxc-t (in erg/cm^2^/s) (SF_TC_STAT) (10)mW.m**-2stat.errordoublenullables_Flxc-t? 1{sigma} systematic uncertainty on Flxc-t (in erg/cm^2^/s) (SF_TC_SYST) (10)mW.m**-2stat.error.sysdoublenullablelogNH[20/24]? Gas column density (LOG_NH) (10)log(cm**-2)phys.columnDensityfloatnullablee_logNH[0/1.0265]? 1{sigma} statistical uncertainty on logNH (SLOG_NH_STAT) (10)log(cm**-2)stat.errorfloatnullables_logNH[0/1.15]? 1{sigma} systematic uncertainty on logNH (SLOG_NH_SYST) (10)log(cm**-2)stat.error.sysfloatnullablelogLX-t[29.0926/32.4171]? Log X-ray (0.5-8 keV) luminosity (in erg/s) (LOG_LTC) (10)log(1e-07W)phys.luminosity;em.X-rayfloatnullablee_logLX-t[0.0198/2.1081]? 1{sigma} statistical uncertainty on logLX-t (in erg/s) (ERR_LOG_LTC) (10)log(1e-07W)stat.errorfloatnullablelogLX-s[28.9726/31.9344]? Log X-ray (0.5-2 keV) luminosity (in erg/s) (LOG_LHC) (10)log(1e-07W)phys.luminosity;em.X-rayfloatnullablee_logLX-s[0.0568/1.9381]? 1{sigma} statistical uncertainty on logLX-s (in erg/s) (ERR_LOG_LHC) (10)log(1e-07W)stat.errorfloatnullableJ/AJ/154/87/table3NGC 6231 CXOVVV Probable Cluster Member CatalogSimbadNameSimbad column added by the CDSmeta.idcharB-V[0.135/2.182]? B-V color (B-V)magphot.color;em.opt.B;em.opt.Vfloatnullablermag[12.3/21.6]? VPHAS r-band magnitude (rmag)magphot.mag;em.opt.RfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXOVVVIAU source name; CXOVVV (JHHMMSS.ss+DDMMSS.s) (Name)meta.id;meta.maincharRAJ2000Right Ascension in decimal degrees (J2000) (Catalog_RAdeg)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (Catalog_DEdeg)degpos.eq.dec;meta.mainCXOUX-ray source name; CXOU J(HHMMSS.ss+DDMMSS.s) (Xray_Name)meta.idcharME[0.6351/6.0809]? X-ray median energy in the total 0.5-8.0 keV band (ME)keVem.energyfloatnullablelogLX-t[28.7075/32.4171]? Absorption-corrected X-ray luminosity in the 0.5-8.0 keV band (in erg/s) (LogLx)log(1e-07W)phys.luminosity;em.X-raydoublenullablee_rmag[0/0.27]? 1{sigma} uncertainty in rmag (e_rmag)magstat.error;phot.mag;em.opt.RfloatnullablelogF-t[-7.21629/-3.36091]? Log incident photon flux in the 0.5-8.0 keV band (PhotonFlux)log(ph.cm**-2.s**-1)phot.flux;em.X-raydoublenullableHD[152200/326340]? OB star name in the HD catalog (Cannon 1936AnHar.100....1C) (HD)meta.idintnullableCPD[7689/7762]? OB star name in the CPD catalog (Gill & Kapteyn 1897AnCap...4....1G) (CPD-41d)meta.idintnullableSegg[0/769]? OB star name in the Seggewiss (1968ZA.....68..142S) catalog (Segg)meta.idintnullableSBL98[20/862]? OB star name in the Sung et al. (1998, J/AJ/115/734) catalog (SBL98)meta.idintnullableBVF99[1/166]? OB star name in the Baume et al. (1999, J/A+AS/137/233) catalog (BVF99)meta.idintnullableSpTypeSpectral type tabulated by Sana et al. (2006, J/MNRAS/372/661) (SpType)src.spTypecharr_SpTypeReference(s) for spectral type given by Sana et al. (2006, J/MNRAS/372/661) (r_SpType) (1)meta.ref;pos.framecharDMSM2016[1/1778]? Source name in the DMS2016 catalog (Damiani et al. 2016, J/A+A/596/A82) (DMSM2016_Name)meta.idintnullableMemb[1/6]? Membership classification in the DMS2016 catalog (DMS2016_Group)src.classintnullableVVVvSource name in the catalog of K_s_ variables in VVV (HHMMSS.ss+DDMMSS.s) (VVVv)meta.idcharRAVdeg? Right ascension of VVV source in decimal degrees (J2000) (VVV_RAdeg)degpos.eq.ranullableDEVdeg? Declination of VVV source in decimal degrees (J2000) (VVV_DEdeg)degpos.eq.decnullableKsmagV[7.96/18.119]? VVV K_s_-band magnitude (Ks_VVV)magphot.mag;em.IR.Kfloatnullablee_KsmagV[0.01/0.316]? 1{sigma} uncertainty in KsmagV (e_Ks_VVV)magstat.error;phot.mag;em.IR.Kfloatnullablef_KsmagV[-9/-1]? Cambridge Astronomical Survey Unit (CASU) flag on KsmagV (flag_Ks_VVV) (2)meta.codeintnullableHmagV[8.565/18.84]? VVV H-band magnitude (H_VVV)magphot.mag;em.IR.Hfloatnullablee_HmagV[0.01/0.344]? 1{sigma} uncertainty in HmagV (e_H_VVV)magstat.error;phot.mag;em.IR.Hfloatnullablef_HmagV[-9/-1]? CASU flag on HmagV (flag_H_VVV) (2)meta.codeintnullableJmagV[8.245/19.285]? VVV J-band magnitude (J_VVV)magphot.mag;em.IR.Jfloatnullablee_JmagV[0.01/0.239]? 1{sigma} uncertainty in JmagV (e_J_VVV)magstat.error;phot.mag;em.IR.Jfloatnullablef_JmagV[-9/-1]? CASU flag on JmagV (flag_J_VVV) (2)meta.codeintnullableYmagV[8.622/20.427]? VVV Y-band magnitude (Y_VVV)magphot.mag;em.IR.Jfloatnullablee_YmagV[0.01/0.352]? 1{sigma} uncertainty in YmagV (e_Y_VVV)magstat.errorfloatnullablef_YmagV[-9/-1]? CASU flag on YmagV (flag_Y_VVV) (2)meta.codeintnullableZmagV[9.011/20.702]? VVV Z-band magnitude (Z_VVV)magphot.mag;em.opt.Ifloatnullablee_ZmagV[0.01/0.292]? 1{sigma} uncertainty in ZmagV (e_Z_VVV)magstat.error;pos.cartesian.zfloatnullablef_ZmagV[-9/-1]? CASU flag on ZmagV (flag_Z_VVV) (2)meta.codeintnullable2MASSSource name in the 2MASS catalog (HHMMSSss+DDMMSSs) (2MASS_ID)meta.idcharJmag2[5.07/17.268]? 2MASS J-band magnitude (J_2M)magphot.mag;em.IR.Jfloatnullablee_Jmag2[0.019/0.91]? 1{sigma} uncertainty in Jmag2 (e_J_2M)magstat.error;phot.mag;em.IR.JfloatnullableHmag2[4.926/16.154]? 2MASS H-band magnitude (H_2M)magphot.mag;em.IR.Hfloatnullablee_Hmag2[0.021/1.297]? 1{sigma} uncertainty in Hmag2 (e_H_2M)magstat.error;phot.mag;em.IR.HfloatnullableKsmag2[4.773/15.96]? 2MASS K_s_-band magnitude (Ks_2M)magphot.mag;em.IR.Kfloatnullablee_Ksmag2[0.016/0.477]? 1{sigma} uncertainty in Ksmag2 (e_Ks_2M)magstat.error;phot.mag;em.IR.KfloatnullableQflg2MASS JHK photometric quality flag (Qflg) (3)meta.code.qual;photcharRflg[2/662]? Source of JHK default mag (Rflg) (3)meta.bibintnullableBflg[1/330]? JHK components fit to source (Bflg) (3)meta.codeintnullableCflgArtifact contamination, confusion (Cflg) (3)meta.codecharXflg[0]? Extended source contamination (Xflg) (3)meta.codeintnullableAflg[0]? Association with asteroid or comet (Aflg) (3)meta.codeintnullableJmag2V[5.07/19.11]? Merged 2MASS and VVV J-band photometry in the 2MASS system (J_synth)magphot.mag;em.IR.JfloatnullableHmag2V[4.93/17.84]? Merged 2MASS and VVV H-band photometry in the 2MASS system (H_synth)magphot.mag;em.IR.HfloatnullableKsmag2V[4.77/17.51]? Merged 2MASS and VVV K_s_-band photometry in the 2MASS system (Ks_synth)magphot.mag;em.IR.KfloatnullableVPHASSource name in the VPHAS+ catalog (Drew et al. 2014, J/MNRAS/440/2036) (VPHAS_ID)meta.idcharumag[10.93/21.29]? VPHAS u-band magnitude (umag)magphot.mag;em.opt.Ufloatnullablee_umag[0/0.3]? 1{sigma} uncertainty in umag (e_umag)magstat.error;phot.mag;em.opt.Ufloatnullablegmag[13.06/22.7]? VPHAS g-band magnitude (gmag)magphot.mag;em.opt.Bfloatnullablee_gmag[0/0.35]? 1{sigma} uncertainty in gmag (e_gmag)magstat.error;phot.mag;em.opt.Bfloatnullabler2mag[12.78/21.87]? VPHAS r2-band magnitude (r2mag)magphot.mag;em.opt.Rfloatnullablee_r2mag[0/0.22]? 1{sigma} uncertainty in r2mag (e_r2mag)magstat.error;phot.magfloatnullableHamag[10.78/20.78]? VPHAS H{alpha}-band magnitude (Hamag)magphot.flux;em.line.Halphafloatnullablee_Hamag[0/0.26]? 1{sigma} uncertainty in Hamag (e_Hamag)magstat.error;phot.mag;em.IR.Hfloatnullableimag[11.77/20.99]? VPHAS i-band magnitude (imag)magphot.mag;em.opt.Ifloatnullablee_imag[0/0.23]? 1{sigma} uncertainty in imag (e_imag)magstat.error;phot.mag;em.opt.IfloatnullableSSB2013[-14/23016]? Source name in the Sung et al. (2013, J/AJ/145/37) catalog (SSB2013_ID)meta.idintnullableVmag[6.088/21.666]? V-band magnitude in the CIT system (Vmag)magphot.mag;em.opt.Vfloatnullablee_Vmag[0/0.234]? 1{sigma} uncertainty in Vmag (e_Vmag)magstat.error;phot.mag;em.opt.VfloatnullableV-I[0.275/4.116]? V-I color (V-I)magphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I[0/0.239]? 1{sigma} uncertainty in V-I (e_V-I)magstat.error;phot.color;em.opt.Vfloatnullablee_B-V[0/0.236]? 1{sigma} uncertainty in B-V (e_B-V)magstat.error;phot.color;em.opt.BfloatnullableU-B[-0.806/1.547]? U-B color (U-B)magphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B[0.001/0.191]? 1{sigma} uncertainty in U-B (e_U-B)magstat.error;phot.color;em.opt.UfloatnullableHamagSSB[-1.215/0.343]? SSB H{alpha} magnitude (Ha_SSB)magphot.flux;em.line.Halphafloatnullablee_HamagSSB[0.001/0.308]? 1{sigma} uncertainty in HamagSSB (e_Ha_SSB)magstat.errorfloatnullableGLIMPSESource name in the GLIMPSE catalog (GLLL.llll+BB.bbbb) (Benjamin et al. 2003, Cat. II/293) (GLIMPSE_ID)meta.idchar3.6mag[8.991/14.743]? Spitzer/IRAC 3.6{mu}m band magnitude (3_6mag)magphot.mag;em.IR.3-4umfloatnullablee_3.6mag[0.034/0.18]? 1{sigma} uncertainty in 3.6mag (e_3_6mag)magstat.errorfloatnullableq_3.6mag[0/110000]? GLIMPSE quality flag on 3.6mag (q_3_6mag) (4)meta.code.qualintnullable4.5mag[9.095/14.241]? Spitzer/IRAC 4.5{mu}m band magnitude (4_5mag)magphot.mag;em.IR.4-8umfloatnullablee_4.5mag[0.045/0.306]? 1{sigma} uncertainty in 4.5mag (e_4_5mag)magstat.errorfloatnullableq_4.5magGLIMPSE quality flag on 4.5mag (q_4_5mag) (4)meta.code.qualchar5.8mag[9.04/12.878]? Spitzer/IRAC 5.8{mu}m band magnitude (5_8mag)magphot.flux.density;em.IR.4-8umfloatnullablee_5.8mag[0.036/0.311]? 1{sigma} uncertainty in 5.8mag (e_5_8mag)magstat.errorfloatnullableq_5.8magGLIMPSE quality flag on 5.8mag (q_5_8mag) (4)meta.code.qualchar8.0mag[9.012/12.545]? Spitzer/IRAC 8.0{mu}m band magnitude (8_0mag)magphot.flux.density;em.IR.8-15umfloatnullablee_8.0mag[0.028/0.334]? 1{sigma} uncertainty in 8.0mag (e_8_0mag)magstat.errorfloatnullableq_8.0magGLIMPSE quality flag on 8.0mag (q_8_0mag) (4)meta.code.qualcharAk[0/2.06]? Estimated absorption in the K_s_-band (A_K_) (Ak)magphys.absorptionfloatnullableAge[0.1/20]? Age estimated from the V versus V-I diagram (age_vi)Myrtime.agefloatnullablelogM(3.2)[-1.36/1.63]? Estimated mass for an age of 3.2 Myr (logM_3_2Myr)solMassphys.massfloatnullablelogM(6.4)[-1.14/1.63]? Estimated mass for an age of 6.4 Myr (logM_6_4Myr)solMassphys.massfloatnullablelogL(3.2)[-1.13/5.75]? Estimated luminosity for an age of 3.2 Myr (logL_3_2Myr)solLumphys.luminosityfloatnullablelogL(6.4)[-1.53/5.75]? Estimated luminosity for an age of 6.4 Myr (logL_6_4Myr)solLumphys.luminosityfloatnullableKsexcess[0/1] Indicator of K_s_-band excess (Ks_excess)phot.color.excessintClassI[0/1] Indicator of classification as a Class I YSO (classI)src.classintClassII[0/1] Indicator of classification as a Class II YSO (classII)src.classintIRexcess[0/1] Indicator of infrared excess (IR_excess)phot.color.excessintJ/AJ/154/87/table4VVV K_s_-band VariablesRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVVVvVVV variable designation (HHMMSS.ss+DDMMSS.s)meta.id;meta.maincharCXOUX-ray source designation; CXOU J(HHMMSS.ss+DDMMSS.s)meta.idcharDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainKsmagmean[11.24/16.46] Mean K_s_-band magnitudemagphot.mag;em.IR.KfloatDKsmag[0.22/2.84] Ks variability amplitude {Delta}K_s_magsrc.var.amplitude;em.IR.Kfloatlogchi2[0.5/5.7] Log chi squared (log {chi}^2^)stat.fit.chi2;arith.zpfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/AJ/154/87/table5Chandra X-ray properties of OB starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameMassive star namemeta.id;meta.maincharSpTypeMK spectral type (1)src.spTypecharCXOUCXOU identifier; CXOU J(HHMMSS.SS+DDMMSS.S)meta.idcharNC[3.3/5447.0]? Net X-ray counts in the total (0.5-8.0 keV) bandctphot.count;em.X-rayfloatnullableME[0.8/2.4]? Median energy of X-ray photons in the 0.5-8.0 keV bandkeVphys.energy;stat.medianfloatnullablel_PKS[<>] Limit flag on PKSmeta.code.errorcharPKS[0.0001/0.05]? X-ray variability probability P_KS_ (2)%statfloatnullablelogNH[18.74/22.48]? Hydrogen column density (3)log(cm**-2)phys.columnDensityfloatnullablee_logNH[0.02/258.34]? Uncertainty in logNHlog(cm**-2)stat.errorfloatnullablekT[0.09/61.04]? kT plasma temperature (3)keVphysfloatnullablee_kT[0/1317.1]? Uncertainty in kTkeVstat.error;phys.energyfloatnullablelogFt[-15.3/0.0]? Log observed X-ray flux (in erg/s/cm^2^)log(mW.m**-2)phot.flux;em.X-rayfloatnullablee_logFt[0.01/1.02]? Uncertainty in logFtlog(mW.m**-2)stat.errorfloatnullablelogFtc[-15.09/0.0]? Log absorption-corrected X-ray flux (in erg/s/cm^2^)log(mW.m**-2)phot.flux;em.X-rayfloatnullableChi2[0/528.8]? {Chi}^2^ statisticstat.fit.chi2floatnullabledof[0/149]? Degrees of freedom in fitstat.fit.dofintnullableDet[0/2]? Detection flag (4)meta.code.errorintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main