J/A+A/374/164ivo://CDS.VizieR/J/A+A/374/164doi:10.26093/cds/vizier.33740164CDSZola S.Niarchos P.Manimanis V.Dapergolas A.2001-07-14T11:20:13Z2001-07-14T11:20:09ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomyphotometryNew CCD observations of the contact binary system BH Cas are presented in this paper. New times of minima and an ephemeris based on our observations are also given. Complete light curves obtained in the V, R and I filters have been analyzed with the Wilson-Devinney code to derive the geometrical and physical parameters of the system. The final solution leads to a contact configuration (f=~21-22%). We have found that the photometric mass ratio differs from the spectroscopic one by about 13%, a discrepancy which is not uncommon for other W UMa systems. The absolute elements of the system are used to study its evolutionary status. The results show that BH Cas is a fairly evolved W-type W UMa system.2001A&A...374..164Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/374/164CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/374/164https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/374/164http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/374/164https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/374/164https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/374/164http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/374/164GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/A+A/374/164/dataIndividual observations of BH Cas in VRI filters (instrumental)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqConsecutive numbermeta.idintHJDV? Julian Date (V filter)dtime.epochdoublenullableDVmag? Comparison - variable magnitude difference in Vmagphot.mag;arith.difffloatnullableHJDRJulian Date (R filter)dtime.epochdoubleDRmagComparison - variable magnitude difference in Rmagphot.mag;arith.difffloatHJDI? Julian Date (I filter)dtime.epochdoublenullableDImag? Comparison - variable magnitude difference in Imagphot.mag;arith.difffloatnullable