J/ApJ/948/59ivo://CDS.VizieR/J/ApJ/948/59doi:10.26093/cds/vizier/ba-xm-1vCDSChen S.Kargaltsev O.Yang H.Hare J.Volkov I.Rangelov B.,Tomsick J.2026-08-03T07:22:36Z2025-07-17T08:30:17ZCDS support team

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

cds-question@unistra.fropen-star-clustersx-ray-sourcesastronomical-object-identificationinfrared-photometryvisible-astronomystellar-massesstellar-ageswhite-dwarf-starssurveysOpen clusters are thought to be the birthplace of most stars in the galaxy. Thus, they are excellent laboratories for investigating stellar evolution, and X-ray properties of various types of stars (including binary stars, evolved stars, and compact objects). In this work, we investigate the population of X-ray sources in the nearby 300Myr old open cluster NGC 3532 using Chandra X-ray Observatory and multiwavelength data from several surveys. We apply a random-forest machine-learning pipeline (MUWCLASS) to classify all confidently detected X-ray sources (signal-to-noise ratio, hereafter S/N, >5) in the field of NGC 3532. We also perform a more detailed investigation of brighter sources, including their X-ray spectra and lightcurves. Most X-ray sources are confirmed as coronally active low-mass stars, many of which are confidently identified by MUWCLASS. Several late B- or early A-type stars are relatively bright in X-rays, most of which are likely binaries. We do not find any compact objects among X-ray sources reliably associated with NGC 3532, down to the limiting X-ray flux of ~2x10^-15^erg/s/cm^2^, corresponding to L_X_~6x10^28^erg/s at the cluster's distance. We also identify several Galactic sources beyond NGC 3532 that differ from typical coronally active stars, and were classified by MUWCLASS as potential compact objects. Detailed investigation reveals that these sources may indeed belong to rarer classes, and deserve follow-up observations.2023ApJ...948...59Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/948/59CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)VII/233 : 2MASS All-Sky Extended Source Catalog (XSC) (IPAC/UMass, 2003-2006)II/328 : AllWISE Data Release (Cutri+ 2013)II/341 : VPHAS+ DR2 survey (Drew+, 2016)II/363 : The band-merged unWISE Catalog (Schlafly+, 2019)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)II/365 : CatWISE2020 catalog (updated version 28-Jan-2021) (Marocco+, 2021)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)IX/70 : Chandra Source Catalog Release 2 (CSC 2.1) (Evans+, 2024)II/386 : VPHAS+ DR3 survey (Drew+, 2025)J/ApJS/169/401 : ChaMP X-ray point source catalog (Kim+, 2007)J/AJ/141/115 : BV(RI)c photometry on NGC 3532 (Clem+, 2011)J/MNRAS/440/2036 : VPHAS+ survey synthetic colours (Drew+, 2014)J/ApJS/212/6 : The McGill magnetar catalog (Olausen+, 2014)J/A+A/581/A28 : Stellar X-ray flares from the 2XMM catalog (Pye+, 2015)J/MNRAS/457/1988 : White dwarfs in Galactic plane (Raddi+, 2016)J/A+A/631/A77 : Low-mass stellar models and isochrones (Amard+, 2019)J/A+A/622/A110 : Spectroscopic membership for NGC 3532 (Fritzewski+, 2019)J/A+A/628/A41 : KIC stars in Kepler/XMM-Newton (Pizzocaro+, 2019)J/A+A/652/A60 : Rotation periods for NGC 3532 (Fritzewski+, 2021)J/ApJ/923/129 : Membership for open clusters with Gaia DR2 (Jaehnig+, 2021)J/A+A/648/A44 : Large-amplitude variables in Gaia DR2 (Mowlavi+, 2021)J/ApJ/941/104 : Classification of Chandra sources (Yang+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/948/59https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/948/59http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/948/59https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/948/59https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/948/59http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/948/59GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/948/59/table2 (All CXO sources detected with S/N>5; Section 5)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/948/59/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/948/59/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/948/59/table2?GETtext/xml+votable180.050000true165.981625-58.7983666670.005555555555555556Cone search capability for table J/ApJ/948/59/table1 (CXO sources without optical or NIR/IR counterparts; Section 4.3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/948/59/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/948/59/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/948/59/table1?GETtext/xml+votable180.050000true166.222083-58.8166670.005555555555555556Cone search capability for table J/ApJ/948/59/table4 (White Dwarfs (WDs) and candidate WDs suggested to be cluster members of NGC 3532; See Appendix D)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/948/59/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/948/59/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/948/59/table4?GETtext/xml+votable180.050000true168.2033333-58.83055560.0055555555555555566/37933 37938 379441.3088508223161842e-20 4.621782916333392e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/948/59?format=asciiX-rayOpticalInfrareddefaultJ/ApJ/948/59/table2All CXO sources detected with S/N>5; Section 5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[165.9/166.6]? CSCv2 master source Right Ascension (J2000)degpos.eq.ra;meta.mainnullableDEJ2000[-59/-58.6]? CSCv2 master source Declination (J2000)degpos.eq.dec;meta.mainnullablePU[0.2/2.5]? Calculated positional uncertainty (1)arcsecstat.error;posfloatnullableSig[5/20.7]? CSCv2 master source X-ray detection significance (significance)stat.fit.goodness;instr.sensitivityfloatnullablee_BPmag[0/0.3]? 1-sigma BPmag uncertaintymagstat.error;phot.mag;em.opt.BdoublenullableRPmag[6.7/21.7]? Gaia eDR3 RP band magnitude, or VPHAS+/DECaPS2 converted equivalentmagphot.mag;em.opt.Rdoublenullablee_RPmag[0/0.4]? 1-sigma RPmag uncertaintymagstat.error;phot.mag;em.opt.RdoublenullableBP-RP[0.04/3.3]? BPmag-RPmag colormagphot.color;em.opt.B;em.opt.Rfloatnullablergeo[286/6089]? Bailer-Jones et al. (2021) Gaia eDR3 rgeo distancepcpos.distancefloatnullablee_rgeo[285/5071]? Bailer-Jones et al. (2021) Gaia eDR3 rgeo distance lower limitpcstat.error;stat.min;pos.distancefloatnullableE_rgeo[287/8181]? Bailer-Jones et al. (2021) Gaia eDR3 rgeo distance upper limitpcstat.error;stat.max;pos.distancefloatnullableLXb[4e+21/6.9e+24]? X-ray broadband luminosity using rgeo distance (Lum-aper90-ave-b)Wphys.luminosity;pos.distance;em.X-raydoublenullableLumGmag[3.3e+23/2.8e+28]? Gmag luminosity using rgeo distanceWphys.luminosity;pos.distance;em.optdoublenullableJmag[6/16.4]? 2MASS J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.02/0.5]? 1-sigma Jmag uncertaintymagstat.error;phot.mag;em.IR.JfloatnullableHmag[5.5/16]? 2MASS H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0.02/0.2]? 1-sigma Hmag uncertaintymagstat.error;phot.mag;em.IR.HfloatnullableKmag[5.38/15.51]? 2MASS K band magnitudemagphot.mag;em.IR.Kfloatnullablecpfl-comb[-4/0]? Combined Counterpart PU flag (3)meta.codefloatnullablesep-gaia[0.07/2.4]? Separation between CXO and Gaia eDR3arcsecpos.angDistance;em.X-ray;em.optfloatnullablesep-2mass[0.03/8.5]? Separation between CXO and 2MASSarcsecpos.angDistance;em.X-ray;em.IR.NIRfloatnullablesep-catwise[0.02/9.23]? Separation between CXO and CatWISEarcsecpos.angDistance;em.X-ray;em.IRfloatnullableflux[0/0.01]? Source flux from specextractmW.m**-2phot.flux;em.X-raydoublenullablee_mek.kT_flare-mek[-12.9/-0.06]? Flare mekal source model: 1-sigma lower uncertainty on mek.kT_flare-mekalkeVstat.error;stat.min;phys.temperaturefloatnullableE_mek.kT_flare-mek[0.08/11.4]? Flare mekal source model: 1-sigma upper uncertainty on mek.kT_flare-mekalkeVstat.error;stat.max;phys.temperaturefloatnullablemek.norm-flare-mek[2.3e-05/0.0004]? Flare mekal source model: normalizationarith.factor;meta.modelleddoublenullablee_mek.norm-flare-mek[-0.0003/-4.4e-06]? Flare mekal source model: 1-sigma lower uncertainty on mek.norm_flare-mekalstat.error;stat.min;arith.factordoublenullableE_mek.norm-flare-mek[6.8e-06/0.12]? Flare mekal source model: 1-sigma upper uncertainty on mek.norm_flare-mekalstat.error;stat.max;arith.factordoublenullableSimbadSimbad column added by the CDSmeta.ref.urlcharNwcSource without optical or NIR/IR counterpart (link to Table 1)meta.ref.urlchar2CXOCSC Verion 2 source name (JHHMMSS.s+DDMMSS)meta.idcharVPHASVPHAS+ DR2 unique identifier (JHHMMSS.s+DDMMSS.s) (sourceID)meta.id.crosscharwOptWhich optical catalog was used as the counterpart?meta.id;meta.datasetcharMemb? NGC 3532 cluster membership, determined by Gaia eDR3 rgeo distance and proper motion ("NGC3535": 57 occurrences; or "No")meta.code.memberchar2MASS-eDR3? 2MASS source name crossmatched from Gaia eDR3 precomputed cross-match catalog (HHMMSSss+DDMMSSs; J2000)meta.id.crosschar2MASS? 2MASS source name, manually crossmatched (HHMMSSss+DDMMSSs; J2000)meta.id.crosscharWISEA-eDR3? ALLWISE source name crossmatched from Gaia eDR3 precomputed cross-match catalog (JHHMMSS.ss+DDMMSS.s)meta.id.crosscharWISEA? ALLWISE source name, manually crossmatched (JHHMMSS.ss+DDMMSS.s) (AllWISE)meta.id.crosscharFcsc-s[0/0.01]? Reprocessed CSCv2 average soft (0.5-1.2keV) band flux with symmetric uncertainties (2)mW.m**-2phot.flux;em.X-ray.softdoublenullablee_Fcsc-s[0/0.01]? 1-sigma Fcsc-s symmetric Uncertainty (2)mW.m**-2stat.error;phot.flux;em.X-ray.softdoublenullableFcsc-m[0/0.01]? Reprocessed CSCv2 average medium (1.2-2keV) band flux with symmetric uncertainties (2)mW.m**-2phot.flux;em.X-ray.softdoublenullablee_Fcsc-m[0/0.01]? 1-sigma Fcsc-m symmetric Uncertainty (2)mW.m**-2stat.error;phot.flux;em.X-ray.softdoublenullableFcsc-h[0/0.01]? Reprocessed CSCv2 average hard (2-7keV) band flux with symmetric uncertainties (2)mW.m**-2phot.flux;em.X-ray.mediumdoublenullablee_Fcsc-h[0/0.01]? 1-sigma Fcsc-h symmetric Uncertainty (2)mW.m**-2stat.error;phot.flux;em.X-ray.mediumdoublenullableFb[0/0.01]? Reprocessed CSCv2 average broad (0.5-7keV) band flux with symmetric uncertainties (flux-aper90-ave-b) (2)mW.m**-2phot.flux;em.X-raydoublenullablee_Fb[0/0.01]? 1-sigma symmetric uncertainty on Fb (e_flux-aper90-ave-b) (2)mW.m**-2stat.error;phot.flux;em.X-raydoublenullableProbKpb[0/1]? Intra-observation Kuiper's test variability probability (kp_intra_prob_b)src.var;stat.probabilityfloatnullableHRMS[-0.86/0.9]? CXO-based medium-soft hardness ratiophot.flux;arith.ratio;em.X-rayfloatnullablee_HRMS[0.03/0.5]? 1-sigma CXO medium-soft hardness ratio Uncertaintystat.error;phot.flux;arith.ratiofloatnullableHRHM[-0.99/0.9]? CXO-based hard- medium hardness ratiophot.flux;arith.ratio;em.X-rayfloatnullablee_HRHM[0/0.6]? 1-sigma CXO hard-medium hardness ratio Uncertaintystat.error;phot.flux;arith.ratiofloatnullableGaiaDR3? Gaia eDR3 unique identifier with catalog prefix, Gaia EDR3 (source_id)meta.id.crossnullableDECaPS2[4.6e+17/4.9e+17]? DECaPS2 (Saydjari+ 2023ApJS..264...28S) unique identifier (OBJ_ID)meta.id.crossnullablepmRA-gaia[-23.1/-4.5]? Gaia eDR3 Proper motion in right ascension pmRA*cosDE of the source in ICRS at Ep=2016.0mas.yr**-1pos.eq.ra;pos.pmfloatnullablee_pmRA-gaia[0.01/1.3]? Standard error of proper motion in right ascension directionmas.yr**-1stat.error;pos.eq.ra;pos.pmfloatnullablepmDE-gaia[-3.4/7]? Gaia eDR3 Proper motion in declination direction (pmdec)mas.yr**-1pos.pm;pos.eq.decfloatnullablee_pmDE-gaia[0.01/1.1]? Standard error of proper motion in declination directionmas.yr**-1stat.error;pos.pm;pos.eq.decfloatnullablePlx-gaia[-2.3/3.5]? Gaia eDR3 Absolute stellar parallax of the source at the Ep=2016.0maspos.parallaxfloatnullablee_Plx-gaia[0/1.3]? Standard error of the stellar parallax at Ep=2016.0masstat.error;pos.parallaxfloatnullableGmag[7.4/22.4]? Gaia eDR3 G band magnitude, or VPHAS+/DECaPS2 converted equivalentmagphot.mag;em.optdoublenullablee_Gmag[0/0.02]? 1-sigma Gmag uncertaintymagstat.error;phot.mag;em.optdoublenullableBPmag[7.8/23.3]? Gaia eDR3 BP band magnitude, or VPHAS+/DECaPS2 converted equivalentmagphot.mag;em.opt.Bdoublenullablee_Kmag[0.01/0.2]? 1-sigma Kmag uncertaintymagstat.error;phot.mag;em.IR.KfloatnullableW1mag[5.36/15.3]? WISE W1 band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag[-0.02/0.2]? 1-sigma W1mag uncertaintymagstat.error;phot.mag;em.IR.3-4umfloatnullableW2mag[5.25/16.05]? WISE W2 band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag[-0.09/0.21]? 1-sigma W2mag uncertaintymagstat.error;phot.mag;em.IR.4-8umfloatnullableW3mag[5.35/13]? WISE W3 band magnitudemagphot.mag;em.IR.8-15umfloatnullablee_W3mag[0.01/0.3]? 1-sigma W3mag uncertaintymagstat.error;phot.mag;em.IR.8-15umfloatnullablecpfl-gaia[-8/0]? Counterpart PU flag for Gaia (3)meta.codeintnullablecpfl-2mass[-8/0]? Counterpart PU flag for 2mass (3)meta.codeintnullablecpfl-catwise[-8/0]? Counterpart PU flag for CatWISE (3)meta.codeintnullablecpfl-unwise[-8/0]? Counterpart PU flag for UnWISE (3)meta.codeintnullablecpfl-allwise[-8/0]? Counterpart PU flag for ALLWISE (3)meta.codeintnullablecpfl-vphas[-8/0]? Counterpart PU flag for VPHAS+ (3)meta.codeintnullablecpfl-2mass-g[-8/0]? Counterpart PU flag for 2MASS Gaia eDR3 precomputed cross-match catalog (3)meta.codefloatnullablecpfl-wisea-g[-8/0]? Counterpart PU flag for ALLWISE Gaia eDR3 precomputed cross-match catalog (cpflag-allwise-gaia) (3)meta.codefloatnullablecpfl-wise12[-4/0]? Counterpart PU flag for WISE catalog used as the counterpart (3)meta.codefloatnullablesep-unwise[0.03/9.53]? Separation between CXO and UnWISEarcsecpos.angDistance;em.X-ray;em.IRfloatnullablesep-allwise[0.02/9.6]? Separation between CXO and ALLWISEarcsecpos.angDistance;em.X-ray;em.IRfloatnullablesep-vphas[0.02/9.8]? Separation between CXO and VPHAS+arcsecpos.angDistance;em.X-ray;em.optfloatnullablesep-decaps[0.05/1.23]? Separation between CXO and DECaPS2arcsecpos.angDistance;em.X-ray;em.optfloatnullableClass-prob[0.28/1]? The classification probability of the predicted class calculated from MUWCLASSmeta.code.class;stat.probabilityfloatnullablee_Class-prob[0/0.37]? 1-sigma Class_prob Uncertaintystat.error;meta.code.class;stat.probabilityfloatnullableCT[0/200]? The classification confidence threshold (CT>=2: confidently classified sources)meta.code.qual;src.classdoublenullableP-CO[0/0.93]? Classification probability of the X-ray source to be classified as a Candidate COmeta.code.class;stat.probabilityfloatnullableP-AGN[0/0.98]? Classification probability of the X-ray source to be classified as an AGNmeta.code.class;stat.probabilityfloatnullableP-NS[0/0.9]? Classification probability of the X-ray source to be classified as a NSmeta.code.class;stat.probabilityfloatnullableP-CV[0/0.5]? Classification probability of the X-ray source to be classified as a CVmeta.code.class;stat.probabilityfloatnullableP-LM-STAR[0/1]? Classification probability of the X-ray source to be classified as a LM-STARmeta.code.class;stat.probabilityfloatnullableP-HM-STAR[0/0.8]? Classification probability of the X-ray source to be classified as a HM-STARmeta.code.class;stat.probabilityfloatnullableP-LMXB[0/0.8]? Classification probability of the X-ray source to be classified as a LMXBmeta.code.class;stat.probabilityfloatnullableP-HMXB[0/0.4]? Classification probability of the X-ray source to be classified as a HMXBmeta.code.class;stat.probabilityfloatnullableP-YSO[0/0.8]? Classification probability of the X-ray source to be classified as a YSOmeta.code.class;stat.probabilityfloatnullablee_P-CO[0/0.4]? 1-sigma P-CO Uncertaintystat.error;stat.probabilityfloatnullablee_P-AGN[0/0.4]? 1-sigma P-AGN Uncertaintystat.error;stat.probabilityfloatnullablee_P-NS[0/0.32]? 1-sigma P-NS Uncertaintystat.error;stat.probabilityfloatnullablee_P-CV[0/0.2]? 1-sigma P-CV Uncertaintystat.error;stat.probabilityfloatnullablee_P-LM-STAR[0/0.2]? 1-sigma P-LM-STAR Uncertaintystat.error;stat.probabilityfloatnullablee_P-HM-STAR[0/0.12]? 1-sigma P-HM-STAR Uncertaintystat.error;stat.probabilityfloatnullablee_P-LMXB[0/0.23]? 1-sigma P-LMXB Uncertaintystat.error;stat.probabilityfloatnullablee_P-HMXB[0/0.1]? 1-sigma P-HMXB Uncertaintystat.error;stat.probabilityfloatnullablee_P-YSO[0/0.2]? 1-sigma P-YSO Uncertaintystat.error;stat.probabilityfloatnullableTeff-gspphot[3248/10039]? Gaia DR3: Effective temperature from GSP-Phot Aeneas best library using BP/RP spectraKphys.temperature.effectivedoublenullableMass-flame[0.54/2.87]? Gaia DR3: Mass of the star from FLAME using stellar models, lum_flame, and teff_gspphotsolMassphys.massfloatnullableAge-flame[0.24/12.5]? Gaia DR3: Age of the star from FLAME using stellar modelsGyrtime.age;meta.modelledfloatnullableSeq[1/131]? Source sequential number used in this workmeta.id;meta.mainintnullableprimaryNetCts[34/619]? Source net counts from wavdetect (NET-COUNTS)ctphot.count;src.net;em.X-rayfloatnullableBkgCts[2/69]? Source background counts from wavdetect (BKG-COUNTS)ctphot.count;instr.backgroundfloatnullablerstat-pl[0.5/1.75]? Powerlaw source model: fit statistic (5)stat.fit;meta.modelledfloatnullableqval-pl[0/1]? Powerlaw source model: probability measure (6)stat.probability;meta.modelledfloatnullablegal.nH-pl[0/5.4]? Powerlaw source model: galactic photoelectric absorption model hydrogen column density1e+22cm**-2phys.columnDensity;meta.modelledfloatnullablee_gal.nH-pl[-1.41/-0.04]? Powerlaw source model: 1-sigma lower uncertainty on gal.nH-pl1e+22cm**-2stat.error;stat.min;phys.columnDensityfloatnullableE_gal.nH-pl[0.05/1.7]? Powerlaw source model: 1-sigma upper uncertainty on gal.nH-pl1e+22cm**-2stat.error;stat.max;phys.columnDensityfloatnullablepl.PhInd[0.67/10]? Powerlaw source model: source photon indexspect.index;meta.modelledfloatnullablee_pl.PhInd[-3.4/-0.22]? Powerlaw source model: 1-sigma lower uncertainty on pl.PhoIndexstat.error;stat.min;spect.indexfloatnullableE_pl.PhInd[0.25/2.7]? Powerlaw source model: 1-sigma upper uncertainty on pl.PhoIndexstat.error;stat.max;spect.indexfloatnullablepl.norm[0/0.01]? Powerlaw source model: normalizationarith.factor;meta.modelleddoublenullablee_pl.norm[-0.01/0]? Powerlaw source model: 1-sigma lower uncertainty on pl.normstat.error;stat.min;arith.factordoublenullableE_pl.norm[0/0.01]? Powerlaw source model: 1-sigma upper uncertainty on pl.normstat.error;stat.max;arith.factordoublenullablerstat-mek[0.5/1.51]? Mekal source model: fit statistic (5)stat.fit;meta.modelledfloatnullableqval-mek[0/1]? Mekal source model: probability measure (6)stat.probability;meta.modelledfloatnullablegal.nH-mek[0/5.2]? Mekal source model: galactic photoelectric absorption model hydrogen column density1e+22cm**-2phys.columnDensity;meta.modelleddoublenullablee_gal.nH-mek[-1.2/-0.05]? Mekal source model: 1-sigma lower uncertainty on gal.nH-mekal1e+22cm**-2stat.error;stat.min;phys.columnDensityfloatnullableE_gal.nH-mek[0/2.4]? Mekal source model: 1-sigma upper uncertainty on gal.nH-mekal1e+22cm**-2stat.error;stat.max;phys.columnDensityfloatnullablemek.kTJ/ApJ/948/59/table1CXO sources without optical or NIR/IR counterparts; Section 4.3Seq[17/92] Source sequential number used in this workmeta.id;meta.mainint2CXO2CXO Position-based Name from CSC Version 2meta.idcharSig[5/7.8] Detection significancestat.fit.goodness;instr.sensitivityfloatClassMost probable classification (1)meta.code.classcharPClass[0.46/0.93] Probability of classificationmeta.code.class;stat.probabilityfloate_PClass[0.07/0.3] Uncertainty in PClassstat.error;stat.probability;src.classfloatCOc[Y/N] Candidate CO status (2)meta.code.classcharFb[0.45/1.1] Broadband (0.5-7keV) flux, 10^-14^erg/s/cm21e-17W.m**-2phot.flux;em.X-rayfloate_Fb[0.1/0.21] Uncertainty in Fb1e-17W.m**-2stat.error;phot.flux;em.X-rayfloatHRMS[-0.33/0.85] Hardness ratio, medium-soft fluxes (Eq. 1a)phot.flux;arith.ratio;em.X-rayfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_HRMS[0.1/0.3] Uncertainty in HRMSstat.error;phot.flux;arith.ratiofloatHRHM[0.6/0.9] Hardness ratio, hard-medium fluxes (Eq. 1b)phot.flux;arith.ratio;em.X-rayfloate_HRHM[0.04/0.11] Uncertainty in HRHMstat.error;phot.flux;arith.ratiofloatPvar[0.013/1] Variability probabilitysrc.var;stat.probabilityfloat_RAPositions from 2CXO names (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2CXO names (declination part)degpos.eq.dec;meta.mainJ/ApJ/948/59/table4White Dwarfs (WDs) and candidate WDs suggested to be cluster members of NGC 3532; See Appendix DSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintField[0/1] 1=WD in the CXO field of NGC3532meta.codeintNameIdentifiermeta.id;meta.maincharTypeObject Typesrc.classcharRAdeg[165.8/168.3] Right Ascension (J2000)degpos.eq.raDEdeg[-59.1/-58.3] Declination (J2000)degpos.eq.decRef[1/3] Reference (1)meta.refint_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