J/A+AS/114/109ivo://CDS.VizieR/J/A+AS/114/109CDSAlcala J.M.KrautterJ.Schmitt J.H.M.M.Covino E.Wichmann R.,Mundt R.1997-12-09T17:54:55Z1997-12-09T18:54:52ZCDS support team

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

cds-question@unistra.frx-ray-sourcesquasarsWe present the observations of the ROSAT all-sky survey (RASS) in the direction of the Chamaeleon cloud complex, as well as the spectroscopic identifications of the detected X-ray sources. The main purpose of this identification program was the search for low mass pre-main sequence stars. Sixteen previously known PMS stars were detected with high confidence by ROSAT. Eight are classical T Tauri stars and eight are weak-line T Tauri stars. Seventy-seven new weak-line T Tauri stars were identified on the basis of the presence of strong Li {lambda}6707 absorption, spectral type later than F0 and chromospheric emission. We give coordinates and count rates of the X-ray sources, and present optical spectra and finding charts for the sources identified optically as new pre-main sequence stars. Optical UBV(RI)c and near-infrared JHKLM photometry for this sample of stars is also provided. In addition, 6 new dKe-dMe candidates are found among the RASS sources.1995A&AS..114..109Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/114/109CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/114/109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/114/109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/114/109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/114/109https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/114/109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/114/109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/114/109/table6 (ROSAT all-sky survey X-ray sources in Chamaeleon)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/114/109/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/114/109/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/114/109/table6?GETtext/xml+votable180.050000true129.245-78.94583330.005555555555555556ROSAThttps://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/114/109?format=asciiX-raydefaultJ/A+AS/114/109/table6ROSAT all-sky survey X-ray sources in ChamaeleonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRXJRXJ X-ray source namemeta.id;meta.maincharm_RXJMultiplicity index on RXJmeta.code.multipcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination signpos.eq.dec;meta.mainnullableCountCount rates from ROSATct/sphot.count;em.X-rayfloate_Countrms uncertainty on Countct/sstat.errorfloatIDOptical identificationmeta.id.crosscharTheta? Offset distancearcsecpos.angDistanceintSpTypeSpectral typesrc.spTypecharTypeType (1)meta.codecharNoteAppearance in finding chartmeta.codecharn_NoteNote (2)meta.notecharRefReferences (3)meta.refchar