J/A+A/495/231ivo://CDS.VizieR/J/A+A/495/231doi:10.26093/cds/vizier.34950231CDSLinder N.Rauw G.Manfroid J.Damerdji Y.De Becker M.Eenens P.,Royer P.Vreux J.-M.2017-06-19T07:58:08Z2009-04-26T09:12:53ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsccd-photometryThe properties of the early-type binary Cyg OB2 #5 have been debated for many years and spectroscopic and photometric investigations yielded conflicting results. We have attempted to constrain the physical properties of the binary by collecting new optical and X-ray observations. The optical light curves obtained with narrow-band continuum and line-bearing filters are analysed and compared. Optical spectra are used to map the location of the He II 4686 and H-alpha line-emission regions in velocity space. New XMM-Newton as well as archive X-ray spectra are analysed to search for variability and constrain the properties of the hot plasma in this system.2009A&A...495..231Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/495/231CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/495/231https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/495/231http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/495/231https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/495/231https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/495/231http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/495/231GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/495/231/table1Photometric time series of Cyg OB2 #5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFilterFilter Name (c1, c2, HeII, CIV, HeI) (1)meta.id;instr.filtercharHJDHeliocentric Julian Daydtime.epoch;pos.heliocentricdoublemagMagnitude in Filtermagphot.magfloate_magUncertainty on the magnitudemagstat.error;phot.magfloat