J/A+A/507/929ivo://CDS.VizieR/J/A+A/507/929doi:10.26093/cds/vizier.35070929CDSSouthworth J.Hickman R.D.G.Marsh T.R.Rebassa-Mansergas A.,Gansicke B.T.Copperwheat C.M.Rodriguez-Gil P.2017-06-27T06:38:33Z2010-03-21T09:50:30ZCDS support team

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

cds-question@unistra.frcataclysmic-variable-starsccd-photometryspectroscopyWe present time-resolved spectroscopy and photometry of SDSS J100658.40+233724.4, which we have discovered to be an eclipsing cataclysmic variable with an orbital period of 0.18591324 days (267.71507min). The observed velocity amplitude of the secondary star is 276+/-7km/s, which an irradiation correction reduces to 258+/-12km/s. Doppler tomography of emission lines from the infrared calcium triplet supports this measurement. We have modelled the light curve using the LCURVE code and Markov Chain Monte Carlo simulations, finding a mass ratio of 0.51+/-0.08. From the velocity amplitude and the light curve analysis we find the mass of the white dwarf to be 0.78+/-0.12M_{sun}_ and the masses and radii of the secondary star to be 0.40+/-0.10M_{sun}_ and 0.466+/-0.036R_{sun}_, respectively. The secondary component is less dense than a normal main sequence star but its properties are in good agreement with the expected values for a CV of this orbital period. By modelling the spectral energy distribution of the system we find a distance of 676+/-40pc and estimate a white dwarf effective temperature of 16500+/-2000K.2009A&A...507..929Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/507/929CatalogResearchIsServedByTAP VizieR generic servicerelated-tohttp://www.sdss.org : SDSS Home PageJ/MNRAS/373/687 : Spectra of 5 faint cataclysmic variables (Southworth+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/507/929https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/507/929http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/507/929https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/507/929https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/507/929http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/507/929GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/507/929/obsSpectroscopic observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of observationdtime.epochdoubleBand[red blue] Red or blueinstr.bandpasscharFileNameName of the fits file in sp subdirectorymeta.id;meta.fitscharJ/A+A/507/929/cahaWhite-light photometry from Calar Alto 2.2mrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of exposure midpointdtime.epochdoublemagApparent magnitude of SDSS J100658.40+233724.4magphot.magfloate_magMeasurement error in apparent magnitudemagstat.error;phot.magfloatJ/A+A/507/929/notWide-V-filter photometry from the NOT 2.5mrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of exposure midpointdtime.epochdoublemagApparent magnitude of SDSS J100658.40+233724.4magphot.magfloate_magMeasurement error in apparent magnitudemagstat.error;phot.magfloat