J/A+AS/145/187ivo://CDS.VizieR/J/A+AS/145/187CDSChavarria-K C.Terranegra L.Moreno-Corral M.A.de Lara E.2000-08-24T10:51:57Z2000-08-24T10:50:48ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsx-ray-sourcesvisible-astronomymedium-band-photometryWe present uvby-{beta} photometry of 116 X-ray flux-selected active stars in the directions of the Orion (40), Taurus-Auriga (58) and Scorpius OB2-2 (18) star forming regions. Additionally, we give near IR JHK photometry of 20 active stars in the Taurus-Auriga direction. The program stars were selected from the ROSAT All Sky Survey and EINSTEIN X-ray surveys and are spectroscopically confirmed weak-line T Tauri stars and weak-line T Tauri star candidates. The photometry confirms the young nature of the program stars and also indicates that a significant fraction of the sample could be foreground objects. The data given here probably represent the largest homogeneous uvby-{beta} photometric sample of new WTTS and WTTS candidates. Many objects in the sample are observed photometrically for the first time.2000A&AS..145..187Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/145/187CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/297/391 : T Tauri stars ROSAT survey (Neuhaeuser+, 1995)J/A+A/312/439 : New T Tauri stars in Taurus-Auriga (Wichmann+, 1996)J/A+AS/123/329 : New weak-line T Tauri stars in Lupus (Krautter+ 1997)J/A+AS/132/173 : New weak-line T Tauri stars in Taurus-Auriga (Li+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/145/187https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/145/187http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/145/187https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/145/187https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/145/187http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/145/187GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-rayOpticaldefaultJ/A+AS/145/187/table1JHK photometry of new WTTS in Taurus-AurigarecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameRXJ designationcharprimarym_NameMultiplicity index on Namecharn_Name[1-4] Note on RXJ (1)charJmagJ magnitudemagfloatHmagH magnitudemagfloatKmagK magnitudemagfloatJ/A+AS/145/187/table2uvby-{beta} photometry of the WTTS in OrionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameDesignation (RXJ or HD/BD)charm_Name[ABab] Multiplicity index on Namecharn_Name[l+*w] Note on RXJ (1)charSpTypeSpectral typecharVmagV magnitudemagfloatb-yb-y colour indexmagfloatm1? m_1_ colour indexmagfloatnullablec1c_1_ colour indexmagfloatu_c1Uncertainty flag on c1charbeta? {beta} indexmagfloatnullableAVAbsorption in V bandmagfloatJ/A+AS/145/187/table3uvby-{beta} photometry of the WTTS in Taurus-AurigarecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameDesignation (RXJ or HD/BD)charprimarym_Name[ABab] Multiplicity index on Namecharn_Name[l+*w] Note on RXJ (1)charSpTypeSpectral typecharVmagV magnitudemagfloatb-yb-y colour indexmagfloatm1? m_1_ colour indexmagfloatnullablec1c_1_ colour indexmagfloatu_c1Uncertainty flag on c1charbeta? {beta} indexmagfloatnullableAVAbsorption in V bandmagfloatJ/A+AS/145/187/table4uvby-{beta} photometry of WTTS in Scorpius OB2-2 and in OphiuchusSpTypeSpectral typecharVmagV magnitudemagfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameDesignation (RXJ or HD/BD)charm_Name[ABab] Multiplicity index on Namecharn_Name[l+*w] Note on RXJ (1)charb-yb-y colour indexmagfloatm1? m_1_ colour indexmagfloatnullablec1c_1_ colour indexmagfloatu_c1Uncertainty flag on c1charbeta? {beta} indexmagfloatnullableAVAbsorption in V bandmagfloat