J/A+AS/127/251ivo://CDS.VizieR/J/A+AS/127/251CDSHuensch M.Schmitt H.H.M.M.Voges W.2023-07-19T15:39:14Z1998-02-04T10:34:20ZCDS support team

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

cds-question@unistra.frgiant-starssupergiant-starsx-ray-sourcesWe present X-ray data for all late-type (A,F,G,K,M) giants and supergiants (luminosity classes I to III-IV) listed in the Bright Star Catalogue that have been detected in the ROSAT all-sky survey. The selection of the sample stars, the data analysis, the criteria for an accepted match between star and X-ray source, and the determination of X-ray fluxes are described.1998A&AS..127..251Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/127/251CatalogResearchIsServedByTAP VizieR generic servicerelated-toIX/11 : ROSAT PSPC Source Catalog (Voges+ 1994)J/A+AS/132/155 : Main-sequence and subgiants ROSAT data (Huensch+ 1998)J/A+AS/135/319 : Late-type main-sequence stars ROSAT data (Huensch+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/127/251https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/127/251http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/127/251https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/127/251https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/127/251http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/127/251GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapROSATX-raydefaultJ/A+AS/127/251/table2RASS detections of BSC late-type giantsLExLikelihood of existencestat.likelihoodintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHRnameBright Star (Cat. <V/50>) numbermeta.id;meta.mainintHDHenry Draper (Cat. <III/135>) numbermeta.idintNameStar's namemeta.idcharVmagV magnitudemagphot.magfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatSpTypeMK spectral classificationsrc.spTypecharBinaryBinary Flag (1)meta.code.errorcharExpTimeEffective exposure timestime.duration;obs.exposureintCountMean PSPC count ratect/sphot.count;em.X-rayfloate_CountError of PSPC count ratect/sstat.error;phot.countfloatDeltaOffset between optical and X-ray positionarcsecpos.angDistance;arith.diffintHRHardness Ratio =(H-S)/(H+S)phot.flux;arith.ratiofloate_HRError of Hardness Ratiostat.errorfloatFXApparent X-ray flux (0.1-2.4 keV)1e-17W.m**-2phot.flux;em.X-rayfloatlog(FX/Fbol)X-ray to bolometric flux ratiophot.flux;arith.ratiofloat