J/ApJS/91/625ivo://CDS.VizieR/J/ApJS/91/625doi:10.26093/cds/vizier.20910625CDSStauffer J.R.Caillault J.-P.Gagne M.Prosser C.F.Hartmann L.W.2018-01-04T08:21:46Z2005-09-21T12:45:55ZCDS support team

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

cds-question@unistra.frx-ray-sourcesopen-star-clustersWe have obtained deep ROSAT images of three regions within the Pleiades open cluster. We have detected 317 X-ray sources in these ROSAT PSPC images, 171 of which we associate with certain or probable members of the Pleiades cluster. We detect nearly all Pleiades members with spectral types later than G0 and within 25 arcminutes of our three field centers where our sensitivity is highest. This has allowed us to derive for the first time the luminosity function for the G, K, and M dwarfs of an open cluster without the need to use statistical techniques to account for the presence of upper limits in the data sample. Because of our high X-ray detection frequency down to the faint limit of the optical catalog, we suspect that some of our unidentified X-ray sources are previously unknown, very low-mass members of the Pleiades.1994ApJS...91..625Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/91/625CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/163 : US Naval Observatory Pleiades CatalogII/131 : Tonantzintla Pleiades Flare Stars (Haro+ 1982)J/ApJS/85/315 : F, G and K dwarf stars of the Pleiades (Soderblom+ 1993)J/A+A/299/696 : Pleiades field Membership probabilities (Schilbach+, 1995)J/A+A/341/751 : ROSAT HRI observations of the Pleiades (Micela+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/91/625https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/91/625http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/91/625https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/91/625https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/91/625http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/91/625GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/91/625/Xsources (X-ray sources (tables 2 and 3 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/91/625/Xsources?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/91/625/Xsources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/91/625/Xsources?GETtext/xml+votable180.050000true55.50666725.0427780.005555555555555556ROSAT5/118 6/461 463 485 487 496https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/91/625?format=asciiX-raydefaultJ/ApJS/91/625/XsourcesX-ray sources (tables 2 and 3 of paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_NoXSimbad column added by the CDScharNoXX-ray numberintprimaryn_NoXindicates a known Pleiades member detailed in tables 7 or 8charRAJ2000Right ascension (J2000) of the sourcepos.eq.ra;meta.mainDEJ2000Declination (J2000) of the sourcepos.eq.dec;meta.mainRate1? Centre field ratect/sfloatnullablee_Rate1? rms uncertainty on Rate1ct/sfloatnullableDist1? Center Field distancearcminintnullableRate2? Northeast Field ratect/sfloatnullablee_Rate2? rms uncertainty on Rate2ct/sfloatnullableDist2? Northeast Field distancearcminintnullableRate3? Northwest field ratect/sfloatnullablee_Rate3? rms uncertainty on Rate3ct/sfloatnullableDist3? Northwest field distancearcminintnullableSourceOptical candidate (1)charn_Source[a-i] Note on Source (2)charDRA? Offset in right ascensionarcsecintnullableDDE? Offset in declinationarcsecintnullableSource2Second optical candidate (1)charn_Source2[a-i] Note on Source2 (2)charDRA2? Offset in right ascension of Source2arcsecintnullableDDE2? Offset in Declination of Source2arcsecintnullableSource3Third optical candidate (1)charDRA3? Offset in right ascension of Source3arcsecintnullableDDE3? Offset in Declination of Source3arcsecintnullableJ/ApJS/91/625/table7Optical and X-ray data for known Pleiades membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoOOptical catalog index numberintNoX? X-ray source numberintnullableNameStar namecharV0Absolute V magnitudemagfloat(B-V)0? Absolute B-V color indexmagfloatnullable(V-I)0? Absolute V-I color indexmagfloatnullablel_vsiniLimit flag on vsinicharvsini? Rotational velocitykm/sintnullablel_logLXLimit flag on logLXcharlogLXX-ray luminositylog(1e-07W)floatn_logLX[v] v when X-ray emission is variablechare_logLX? rms uncertainty on logLXlog(1e-07W)floatnullablel_log(LX/Lbol)Limit flag on log(LX/Lbol)charlog(LX/Lbol)X-ray luminosity versus bolometric luminosity ratiofloatName2Other namecharName3Other namecharJ/ApJS/91/625/table8Optical data for known Pleiades members with blended X-ray emissionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoOOptical numberintNoX? X-ray numberintnullableNameStar namecharf_Nameblended (1)charV0Absolute V magnitudemagfloat(B-V)0? Absolute B-V color indexmagfloatnullable(V-I)0? Absolute V-I color indexmagfloatnullablel_vsiniLimit flag on vsinicharvsini? Rotational velocitykm/sintnullablelogLbolBolometric luminositylog(1e-07W)floatName2Other namecharName3Other namechar