J/A+AS/127/201ivo://CDS.VizieR/J/A+AS/127/201CDSManfroid J.Burnet M.Renson P.1998-02-04T09:09:33Z1998-02-04T10:09:27ZCDS support team

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

cds-question@unistra.frap-starsvisible-astronomynarrow-band-photometryThe photometric behaviour of 21 Ap stars has been analyzed from observations obtained in the Geneva system. Variability has been detected for 9 Ap stars, as well as for a star which initially was a comparison star. Preliminary values for the periods are presented as well as an analytical description of the light curves. The material has been collected during a 23-night observing run at La Silla with the 70cm telescope of the Geneva Observatory equipped with the standard Geneva photometer. The parameters of a second-order cosine fit to the lightcurves are stored in the accompanying table. Time origin is JD 2450000.0. The 17 phase diagrams for each of the 9 stars are presented in 9 postscript files. The observational data are superimposed on the Fourier fit. Data are differential, except for HD 191439 and HD 192674 which had no suitable comparisons.1998A&AS..127..201Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/127/201CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/127/201https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/127/201http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/127/201https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/127/201https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/127/201http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/127/201GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/127/201/table4Variations of Ap stars in the Geneva systemrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD (Cat. <III/135>) numbermeta.id;meta.mainintPerPerioddtime.periodfloatIndexIndex/magnitude (1)stat.fit.paramintB1Amplitude of fundamental cosine component (see Eq. 1 in article)magsrc.var.amplitudefloate_B1Error on B1magstat.errorfloatB2Amplitude of harmonicmagsrc.var.amplitudefloate_B2Error on B2magstat.errorfloatPHI1Phase of fundamental component computed with time origin = JD 2450000radstat.fit.paramfloate_PHI1Error on PHI1radstat.errorfloatPHI2Phase of harmonicradstat.fit.paramfloate_PHI2? Error on PHI2radstat.errorfloatnullableRMSScatter around the analytical fitmagstat.fit.paramfloatRTotal range of analytical light curvemagsrc.var.amplitudefloatS/NSignal-to-noise ratiostat.snrfloat