J/A+A/353/1044ivo://CDS.VizieR/J/A+A/353/1044doi:10.26093/cds/vizier.33531044CDSHearty T.Neuhaeuser R.Stelzer B.Fernandez M.Alcala J.M.,Covino E.Hambaryan V.2000-02-07T10:55:29Z2000-02-07T11:55:07ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsx-ray-sourcesline-intensitiesWe present the ROSAT PSPC pointed and ROSAT All-Sky Survey (RASS, Cat. <IX/10>) observations and the results of our low and high spectral resolution optical follow-up observations of the T Tauri stars (TTS) and X-ray selected T Tauri star candidates in the region of the high galactic latitude dark cloud MBM 12 (L1453-L1454, L1457, L1458). Table 4 lists all of the X-ray detected sources in the direction of the molecular cloud MBM12 along with relevant X-ray and optical data.2000A&A...353.1044Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/353/1044CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)IX/11 : ROSAT PSPC Source Catalog (Voges+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/353/1044https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/353/1044http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/353/1044https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/353/1044https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/353/1044http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/353/1044GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/353/1044/table4 (ROSAT detected X-ray sources in the direction)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/353/1044/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/353/1044/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/353/1044/table4?GETtext/xml+votable180.050000true41.8637519.3733330.005555555555555556ROSAT5/63 106 6/239 246-247 250 595-597 599 601 768 770 772 776https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/353/1044?format=asciiX-raydefaultJ/A+A/353/1044/table4ROSAT detected X-ray sources in the directionNameName (2)charrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intSeqSequential number of the X-ray source (1)intm_SeqMultiplicity index when several possible optical counterpartscharSurvey"RASS" (ROSAT All Sky Survey) or "RPOS" (Pointed Observation sources)charRAJ2000X-ray right ascension (J2000)DEJ2000X-ray declination (J2000)MLMaximum Likelihood for Existencefloate_MLrms uncertainty on MLfloatCountRateX-ray count rate in the 0.1-2.0 keV bandct/sfloatHR1X-ray hardness ratio 1floate_HR1rms uncertainty on HR1floatHR2? X-ray hardness ratio 2floatnullablee_HR2? rms uncertainty on HR2floatnullableVmag? Optical counterpart visual magnitudemagfloatnullablen_Vmag[:] Note on Vmag (3)charlog(fx/fv)? X-ray to optical flux ratiofloatnullableSpTOptical counterpart spectral typecharW(Ha)? H{alpha} equivalent width0.1nmfloatnullablen_W(Ha)[f] f: filledcharW(Li)? Lithium equivalent width0.1nmfloatnullableCommentsComments on individual sourceschar