J/A+AS/128/29ivo://CDS.VizieR/J/A+AS/128/29CDSPiters A.J.M.Van Paradijs J.Schmitt J.H.M.M.1999-02-27T11:31:18Z1999-02-27T12:31:10ZCDS support team

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

cds-question@unistra.frdwarf-starsvisible-astronomyWide-band photometryeffective-temperaturex-ray-sourcesTable 1 lists the sample of 173 stars observed for this study. They are selected from the Bright Star Catalogue (Cat. <V/50>), with the following selection criteria: - Spectral type between A8 and G2; no spectral peculiarities noted; not double in spectral type classification (e.g., HR 32 with spectral type F2V+F6V is excluded); - Luminosity class V; - Right ascension between 0h and 2h, or between 14h and 24 h, declination south of +10 degrees (defining the region on the sky visible during the appointed observation times); - Binaries for which both components occurred in the BSC are excluded, if the separation is less than 10". Not listed are five stars for which no (Walraven photometric and ROSAT X-ray) data are available. These are HR 591, HR 5542, HR 6593, HR 8245 and HR 8735. Table 2 lists the Walraven photometric (VBLUW) data for all but four stars from Table 1. Also listed in Table 2 are the effective temperature, surface gravity and the reddening, as derived from comparison with theoretical colours. Table 5 lists the ROSAT All Sky Survey data for all but 11 stars from Table 1. For a description of the Walraven photometric system, see e.g. <GCPD/11>1998A&AS..128...29Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/128/29CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/128/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/128/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/128/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/128/29https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/128/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/128/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-raydefaultJ/A+AS/128/29/table1Sample starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHRHR (Cat. <V/50>) numbermeta.id;meta.mainintprimaryNote[AB] See Note (1)meta.notecharTypeSpectral Type (2)src.spTypecharVmagApparent visual Johnson V magnitude (2)magphot.mag;em.opt.VfloatB-VJohnson's B-V colour (2)magphot.color;em.opt.B;em.opt.VfloatJ/A+AS/128/29/table2Walraven photometry datao_B-LNumber of observationsmeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHRHR number (as in table1)meta.id;meta.mainintprimaryNote[*] See Note (1)meta.notecharVWmagvisual (Walraven) magnitude Vmagphot.mag;em.opt.Vdoublee_VWmagstandard deviation in VWmagmagstat.errordoubleV-BWalraven colour V-Bmagphot.colordoublee_V-BStandard deviation in V-Bmagstat.errordoubleB-UWalraven colour B-Umagphot.colordoublee_B-UStandard deviation in B-Umagstat.errordoubleU-WWalraven colour U-Wmagphot.colordoublee_U-WStandard deviation in U-Wmagstat.errordoubleB-LWalraven colour B-Lmagphot.colordoublee_B-LStandard deviation in B-Lmagstat.errordoubleTeffEffective temperatureKphys.temperature.effectiveinte_Teff? Uncertainty in Teff (2)Kstat.errorintnullableloggLogarithm of surface gravitylog(cm.s**-2)phys.gravityfloate_logg? Uncertainty in logg (2)log(cm.s**-2)stat.errorfloatnullableE(V-B)The reddening E(V-B)magphot.color.excessfloate_E(V-B)? Uncertainty in E_V-B (2)magstat.errorfloatnullableJ/A+AS/128/29/table5ROSAT X-ray dataNote[U] See Note (1)meta.notecharCountX-ray count rates**-1phot.count;em.X-rayfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHRHR number (as in table1)meta.id;meta.mainintprimaryE_Count? Positive uncertainty in Counts**-1stat.errorfloatnullablee_Count? Negative uncertainty in Counts**-1stat.errorfloatnullableXHR? Hardness ratiophot.flux;arith.ratiofloatnullableE_XHR? Positive uncertainty in XHRstat.errorfloatnullablee_XHR? Negative uncertainty in XHRstat.errorfloatnullablelogCxLog of energy-conversion factor (2)log(1e+07cm**2.J**-1)instr.paramfloatE_logCx? Positive uncertainty in logCxlog(1e+07cm**2.J**-1)stat.errorfloatnullablee_logCx? Negative uncertainty in logCxlog(1e+07cm**2.J**-1)stat.errorfloatnullablelognHLogarithm of hydrogen column densitylog(cm**-2)phys.columnDensityfloate_lognHUncertainty in lognHlog(cm**-2)stat.errorfloatlogRxLog of Normalized X-ray flux density (3)phot.flux;arith.ratiofloatE_logRx? Positive uncertainty in logRxstat.errorfloatnullablee_logRx? Negative uncertainty in logRxstat.errorfloatnullablelogFxLog of X-ray surface flux density (3)phot.flux;em.X-rayfloatE_logFx? Positive uncertainty in logFxstat.errorfloatnullablee_logFx? Negative uncertainty in logFxstat.errorfloatnullablelogLxLogarithmic X-ray luminosity (3)phys.luminosity;em.X-rayfloatE_logLx? Positive uncertainty in logLxstat.errorfloatnullablee_logLx? Negative uncertainty in logLxstat.errorfloatnullable