J/A+A/312/818ivo://CDS.VizieR/J/A+A/312/818doi:10.26093/cds/vizier.33120818CDSDachs J.Hummel W.1997-12-09T16:45:12Z1997-12-09T17:45:06ZCDS support team

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

cds-question@unistra.frx-ray-sourcesopen-star-clustersThe ROSAT PSPC detector was used to obtain a deep pointing with its center on the young open cluster NGC 2516 and total integration time of 9284 sec. Altogether 64 X-ray sources were detected showing strong concentration towards the optical cluster centre. This suggests that most of the sources are actually associated with NGC 2516. 42 of these sources could be identified with optical stars in the field of the cluster; after correction for a mean offset between optical and nominal ROSAT positions of about 13", optical star and X-ray source positions are found to agree, on the average, within about 9", while maximum observed positional differences amount to 27". X-ray sources identified with optical cluster stars include HR 3147 (=HD 66194; B2.5IVe), the visually brightest B star in the cluster, three close visual late B-type binaries (h 4027 A,B, h 4031 A,B, and I 1104 A,B) with projected separations ranging between about 4x10^16^cm and 6x10^16^cm, as well as several (six) chemically peculiar Bp/Ap(Si) and Ap(SrCrEu) stars.1996A&A...312..818Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/312/818CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/312/818https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/312/818http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/312/818https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/312/818https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/312/818http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/312/818GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/312/818/table2 (X-ray sources detected in NGC 2516)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/312/818/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/312/818/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/312/818/table2?GETtext/xml+votable180.050000true118.1470833-61.07313890.005555555555555556Cone search capability for table J/A+A/312/818/table3 (Stars in the field of NGC 2516 identified with ROSAT X-ray sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/312/818/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/312/818/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/312/818/table3?GETtext/xml+votable180.050000true118.14-61.0750.005555555555555556ROSAThttps://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/312/818?format=asciiX-raydefaultJ/A+A/312/818/table6Properties of X-ray sources identified with optical stars of known (or assumed) distancerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoRunning number of table2meta.idintprimarym_No[)] A ')' indicates the second component of a binarymeta.code.multipcharNameIdentification from table3 HD, CPD, CD or DKmeta.id;meta.maincharSpSpectral type (from DK or this paper)src.spTypecharVmagV magnitude (from DK)magphot.mag;em.opt.Vfloatu_VmagUncertainty flag on Vmagmeta.code.errorcharB-V? B-V color index (from DK)magphot.color;em.opt.B;em.opt.VfloatdAdopted distancepcpos.distanceintu_dUncertainty flag on distancemeta.code.errorcharMvInferred absolute visual magnitudemagphys.magAbs;em.optfloatu_MvUncertainty flag on Mvmeta.code.errorcharLbolBolometric luminositysolLumphys.luminosityfloatu_LbolUncertainty flag on Lbolmeta.code.errorcharFx? ROSAT X-ray flux (10^-14^erg/cm^2^/s) (1)1e-14mW.m**-2phot.flux;em.X-rayfloatu_FxUncertainty flag on Fxmeta.code.errorchare_Fx? rms uncertainty on Fx1e-14mW.m**-2stat.errorfloatLx? X-ray luminosity (0.16-2.5keV)1e-07Wphys.luminosity;em.X-raydoublee_Lx? Rms uncertainty on Lx1e-07Wstat.errordoubleu_LxUncertainty flag on Lxmeta.code.errorchar-log(Lx/Lbol)? -log(X-ray/bolometric luminosities)phys.luminosity;arith.ratiofloatu_-log(Lx/Lbol)Uncertainty flag on -log(Lx/Lbol)meta.code.errorcharJ/A+A/312/818/table2X-ray sources detected in NGC 2516HR2Hardness ration HR2phot.flux;arith.ratiofloatu_DrUndertainty flag on Drmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNo[1/64] Running number (increasing with {alpha})meta.id;meta.mainintprimarySeq? X-ray source number, as detected with EXSAS reduction package (increasing with -{delta})meta.idintm_SeqMultiplicity index on Seqmeta.code.multipcharRA2000Right ascension (2000.0) (1)pos.eq.ra;meta.mainDE2000Declination signpos.eq.dec;meta.mainnullableDr90% confidence source radiusarcsecphys.angSize;srcfloatCtRateCount rate corrected for vignetting and for the life-time factor (=0.978)ct/sphot.count;em.X-rayfloate_CtRaterms uncertainty on Count ratect/sstat.errorfloatHR1Hardness ratio HR1phot.flux;arith.ratiofloatu_HR1Uncertainty flag on HR1meta.code.errorchare_HR1? rms uncertainty on HR1stat.errorfloatu_HR2Uncertainty flag on HR2meta.code.errorchare_HR2? rms uncertainty on HR2stat.errorfloatJ/A+A/312/818/table3Stars in the field of NGC 2516 identified with ROSAT X-ray sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNo? Running number from table2meta.idintprimarym_No[)] A ')' indicates the second component of a binarymeta.code.multipcharNameIdentification HD, CPD or CDmeta.idcharn_Name[bc] b = HR 3138; c = HR 3147meta.notecharDK? Running number in the photometric study of Dachs and Kabus (1989), hereafter DKmeta.idintm_DKMultiplicity index on DKmeta.code.multipcharSpSpectral typesrc.spTypecharn_Sp[g] A 'g' indicates new spectral typemeta.notecharRA2000Right ascension 2000.0 (optical source)pos.eq.ra;meta.mainn_RA[def] (1)meta.notecharDE2000Declination signpos.eq.dec;meta.mainnullablen_DE[def] (1)meta.notecharDRAPosition difference ROSAT minus optical in RA (2)spos.eq.ra;arith.difffloatn_DRA[d] (1)meta.notecharDDEPosition difference ROSAT minus optical in DE (2)arcsecpos.eq.dec;arith.difffloatn_DDE[d] (1)meta.notecharDrAngular distance between optical and X-ray positionsarcsecpos.angDistancefloatMembCluster membership of star, M=member, NM=non-membermeta.code.memberchar