J/A+A/333/619ivo://CDS.VizieR/J/A+A/333/619doi:10.26093/cds/vizier.33330619CDSPreibisch T.Guenther E.Zinnecker H.Sterzik M.Frink S.Roeser S.1998-06-05T15:01:10Z1998-06-05T15:01:07ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsline-intensitiesproper-motionsstellar-associationsWe present the results of an intermediate resolution spectroscopic survey for pre-main sequence (PMS) stars in the Upper Scorpius OB association. In a 160 square-degree area we were able to identify 39 new PMS stars by follow up observations of X-ray selected stars with the multi object spectrograph FLAIR at the UK Schmidt Telescope. We also investigated the completeness of our X-ray selected sample by observing more than 100 stars that were not detected as X-ray sources, but have proper motions indicating membership to Upper Sco. While the new X-ray selected PMS stars with known proper motions have kinematics consistent with membership, none of the X-ray quiet proper motion candidates is a PMS star. We conclude that our X-ray selected sample of PMS stars seems to be rather complete. For stars in the magnitude interval 11.5<~B<~13.5 we derive a conservative lower limit of 75% completeness.1998A&A...333..619Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/333/619CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/333/619https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/333/619http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/333/619https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/333/619https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/333/619http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/333/619GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/333/619/tablea1 (Results for the X-ray selected PMS candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/333/619/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/333/619/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/333/619/tablea1?GETtext/xml+votable180.050000true229.244167-24.3933330.005555555555555556Cone search capability for table J/A+A/333/619/tablea2 (Results for the proper motion selected PMS candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/333/619/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/333/619/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/333/619/tablea2?GETtext/xml+votable180.050000true232.464583-25.2491670.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/333/619?format=asciiOpticaldefaultJ/A+A/333/619/tablea1Results for the X-ray selected PMS candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGSCGSC (Cat. <I/220>) numbermeta.id;meta.maincharIndexSee Note (1)meta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainBmagB magnitude from GSC (Cat. <I/220>)magphot.mag;em.opt.BfloatCRROSAT count ratect/sphot.count;em.X-rayfloatu_CR[:<] Uncertainty/upper limit note (2)meta.code.errorcharW(Li)Li line equivalent width0.1nmspect.line.eqWidthfloatu_W(Li)[:<] Uncertainty/upper limit note (2)meta.code.errorcharW(Ha)H{alpha} line equivalent width0.1nmspect.line.eqWidthfloatSpTypeSpectral typesrc.spTypecharu_SpTypeUncertainty flag on SpTypemeta.code.errorcharTypeSee Note (3)meta.notecharpmRA? Proper motion in right ascension *cos(delta)mas/yrpos.pm;pos.eq.raintnullablepmDE? Proper motion in declinationmas/yrpos.pm;pos.eq.decintnullableJ/A+A/333/619/tablea2Results for the proper motion selected PMS candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGSCGSC (Cat. <I/220>) numbermeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainBmagB magnitude from GSCmagphot.mag;em.opt.Bfloatu_Bmag[:<] Uncertainty/upper limit note (1)meta.code.errorcharW(Li)Li line equivalent width0.1nmspect.line.eqWidthfloatu_W(Li)[:<] Uncertainty/upper limit note (1)meta.code.errorcharW(Ha)H{alpha} line equivalent width0.1nmspect.line.eqWidthfloatSpTypeSpectral typesrc.spTypecharu_SpTypeUncertainty flag on SpTypemeta.code.errorcharTypeSee Note (2)meta.notecharpmRAProper motion in right ascension *cos(delta)mas/yrpos.pm;pos.eq.raintpmDEProper motion in declinationmas/yrpos.pm;pos.eq.decint