J/A+AS/138/87ivo://CDS.VizieR/J/A+AS/138/87CDSCutispoto G.Pastori L.Tagliaferri G.Messina S.Pallavicini R.,Rodono M.1999-10-12T08:15:31Z1999-10-12T08:13:36ZCDS support team

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

cds-question@unistra.frradio-sourcesultraviolet-astronomyinfrared-photometryvisible-astronomyWide-band photometryradial-velocityWe present the results of high-precision UBV(RI)_c_ photometric observations and of spectroscopic radial velocity measurements obtained at the European Southern Observatory for a sample of 51 cool stars detected in the EUV by the ROSAT Wide Field Camera (WFC). Using also recent results from HIPPARCOS, we infer spectral types and investigate the single or binary nature of the sample stars. Optical variability, with periods in the 0.4-13 day range, has been detected for the first time in 15 of these stars.1999A&AS..138...87Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/138/87CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/119/281 : Long-term monitoring of active stars. V. (Cutispoto, 1996)J/A+AS/121/369 : Long-term monitoring of active stars. VI. (Cutispoto, 1997)J/A+AS/127/207 : Long-term monitoring of active stars. VII. (Cutispoto 1998)J/A+AS/131/321 : Long-term monitoring of active stars. VIII. (Cutispoto 1998)J/A+AS/115/41 : UBV(RI) photometry of cool stars (Cutispoto+, 1996)J/MNRAS/260/77 : ROSAT Wide Field Camera EUV Bright Sources (Pounds+ 1993)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)IX/11 : ROSAT PSPC Source Catalog (Voges+ 1994)IX/12 : The WGACAT version of ROSAT sources (White+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/138/87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/138/87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/138/87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/138/87https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/138/87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/138/87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/138/87/table1 (UBVRI maximum luminosity and colors)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/138/87/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/138/87/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/138/87/table1?GETtext/xml+votable180.050000true6.171667-74.2344440.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/138/87?format=asciiUVOpticalInfraredRadiodefaultJ/A+AS/138/87/table1UBVRI maximum luminosity and colorsNameStar namecharprimaryl_d(H)Limit flag on d(H)charrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intLinkcharVmagV magnitude at maximum luminositymagfloatn_Vmag[*] Note on Vmag (1)charU-B? U-B colour index at maximum luminositymagfloatnullableB-VB-V colour index at maximum luminositymagfloatu_B-VUncertainty flag on B-VcharV-R? V-R colour index at maximum luminositymagfloatnullableV-I? V-I colour index at maximum luminositymagfloatnullableu_V-IUncertainty flag on V-IcharEpochEpoch of observation code (2)charspTypeSpectral Type inferred from the colorschard(H)Hipparcos (Cat. <I/239>) parallaxmasintu_d(H)Uncertainty flag on d(H)charl_d(ph)Limit flag on d(ph)chard(ph)Photometric parallaxmasintu_d(ph)Uncertainty flag on d(ph)charRAJ2000Right Ascension J2000 (hours) (3)DEJ2000Declination J2000 (degrees) (3)J/A+AS/138/87/table2Observational datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameStar namecharprimaryn_Name[bd] Note on Name (1)charVNameVariable namecharVmaxlMaxixmun V magnitude reported in the literaturemagfloatn_Vmaxl[c] Note on Vmaxl (2)charVmax? Observed maximum V magnitudemagfloatnullablen_Vmax[c] Note on Vmax (2)charDVmag? Observed amplitude of variationmagfloatnullablel_PerLimit flag on PercharPer? Photometric or orbital periodddoublenullablen_Per[*] Note on Per (3)charl_vsiniLimit flag on vsinicharvsini? Observed rotational velocitykm/sintnullablee_vsini? rms uncertainty on vsinikm/sintnullablen_vsini[av] Note on vsini (4)charEW? Measured Ca I 6717.7{AA} equivalent widthpmfloatnullablen_EW2[+]charEW2? Second Ca I equivalent widthpmfloatnullablen_EW[e] Note on EW (5)charJ/A+AS/138/87/table5Heliocentric radial velocitiesSRSpectral regioncharNotesNotes (1)charNlineNumber of line usedintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameStar namecharprimaryHJDHeliocentric Julian dateddoubleHRVHeliocentric radial velocitykm/sfloate_HRVrms uncertainty on HRVkm/sfloatJ/A+AS/138/87/lcurvesUBVRI light curvesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameStar name (1)charprimaryHJDHeliocentric Julian dateddoublePhase? [0/1] PhasedoublenullableVmagV magnitudemagfloatU-B? U-B colour indexmagfloatnullableB-V? B-V colour indexmagfloatnullableV-RV-R colour indexmagfloatV-I? V-I colour indexmagfloatnullableNote[EF] NotecharJ/A+AS/138/87/dcurvesDifferential magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameStar namecharprimaryComp1First comparison star namecharComp2Second comparison star namecharHJDHeliocentric Julian dateddoublePhase? [0/1] Phase (1)floatnullableDUmag? Differential U magnitude (Comp1-Comp2)magfloatnullableDBmag? Differential B magnitude (Comp1-Comp2)magfloatnullableDVmag? Differential V magnitude (Comp1-Comp2)magfloatnullableDRmag? Differential R magnitude (Comp1-Comp2)magfloatnullableDImag? Differential I magnitude (Comp1-Comp2)magfloatnullableJ/A+AS/138/87/averageAverage differential magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameStar namecharprimaryComp1First comparison star namecharComp2Second comparison star namecharDUmagAverage differential U magnitude (Comp1-Comp2)magfloate_DUmagrms uncertainty on UmagmagfloatDBmagAverage differential B magnitude (Comp1-Comp2)magfloate_DBmagrms uncertainty on BmagmagfloatDVmagAverage differential V magnitude (Comp1-Comp2)magfloate_DVmagrms uncertainty on VmagmagfloatDRmagAverage differential R magnitude (Comp1-Comp2)magfloate_DRmagrms uncertainty on RmagmagfloatDImagAverage differential I magnitude (Comp1-Comp2)magfloate_DImagrms uncertainty on ImagmagfloatJ/A+AS/138/87/photComparison stars UBVRI photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intCompComparison star namecharUmagU magnitudemagfloate_Umagrms uncertainty on UmagmagfloatBmagB magnitudemagfloate_Bmagrms uncertainty on BmagmagfloatVmagV magnitudemagfloate_Vmagrms uncertainty on vmagmagfloatRmagR magnitudemagfloate_Rmagrms uncertainty on RmagmagfloatImagI magnitudemagfloate_Imagrms uncertainty on ImagmagfloatU-BU-B colour indexmagfloatB-VB-V colour indexmagfloatV-RV-R colour indexmagfloatV-IV-I colour indexmagfloatn_Comp[*] *: Program starcharJ/A+AS/138/87/figuresFigure captionsTextCaption of the figurecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intFigFigure number (postscript file in subdirectory fig)intNameStar namecharprimary