J/A+A/486/505ivo://CDS.VizieR/J/A+A/486/505doi:10.26093/cds/vizier.34860505CDSZharikov S.V.Tovmassian G.H.Neustroev V.V.Michel R.Zurita C.,Echevarria J.Bikmaev I.F.Pavlenko E.P.Jeon Y.-B.Valyavin G.G.,Aviles A.2017-06-26T11:49:32Z2008-07-30T12:44:03ZCDS support team

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

cds-question@unistra.frcataclysmic-variable-starsvariable-starsphotometryWe observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2 to study the origin of long-term variability found in its light curve. Multi-longitude, time-resolved, photometric observations were acquired to analyze this uncommon behavior, which has been found in two newly discovered CVs. This study of SDSS J080434.20+510349.2 concerns primarily the understanding of the nature of the observed, double-humped, light curve and its relation to a cyclic brightening that occurs during quiescence. The observations were obtained early in 2007, when the object was at about V~17.1, about 0.4mag brighter than the pre-outburst magnitude. The light curve shows a sinusoidal variability with an amplitude of about 0.07mag and a periodicity of 42.48min, which is half of the orbital period of the system. We observed in addition two "mini-outbursts" of the system of up to 0.6mag, which have a duration of about 4days each. The "mini-outburst" has a symmetric profile and is repeated in approximately every 32days. Subsequent monitoring of the system shows a cyclical behavior of such "mini-outbursts" with a similar recurrence period. The origin of the double-humped light curve and the periodic brightening is discussed in the light of the evolutionary state of SDSS J080434.20+510349.2.2008A&A...486..505Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/486/505CatalogResearchIsServedByTAP VizieR generic servicerelated-toV/123 : Catalog of Cataclysmic Variables (Downes+ 2001-2006)J/A+AS/101/87 : Walraven phot. of 8 Cataclysmic variables (Hollander+ 1993)J/PASP/109/441 : Northern Cataclysmic Variables (Henden+ 1997)J/A+A/332/586 : Cataclysmic variables light curves (Bruch 1998)J/A+A/456/599 : Light curves of 5 cataclysmic variables (Papadaki+, 2006)J/ApJ/565/511 : Cataclysmic variables in the 2MASS 2IDR (Hoard+, 2002)J/other/NewA/13.133 : 2MASS photometry of cataclysmic variables (Ak+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/486/505https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/486/505http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/486/505https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/486/505https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/486/505http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/486/505GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/486/505/lcTime-resolved photometric data of SDSS J080434.20+510349.2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian date HJDdtime.epochdoubleVmagV band magnitudemagphot.mag;em.opt.Vfloat