J/A+A/554/A25ivo://CDS.VizieR/J/A+A/554/A25doi:10.26093/cds/vizier.35540025CDSMichel R.Echevarria J.Hernandez Santisteban J.V.2017-06-13T11:08:23Z2013-05-30T14:46:24ZCDS support team

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

cds-question@unistra.frcataclysmic-variable-starseclipsing-binary-starsvisible-astronomyWide-band photometryWe present new photometry of the faint (g~19mag) and poorly studied cataclysmic variable SDSS J152419.33+220920.0, analyze its light curve and provide an accurate ephemeris for this system. Time-resolved CCD differential photometry was carried out using the 1.5m and 0.84m telescopes at the Observatorio Astronomico Nacional at San Pedro Martir. All observations were taken in white-light (no filter). This table contains the differential photometry for the system obtained during six nights (covering more than twenty primary eclipse cycles in more than three years). The reference for the photometry is SDSS J152415.99+220804.0, g=17.77 (marked as star C1 in the paper). The associated errors are 0.02mag outside eclipse. The information for each observation run is presented in Table 1 and the light-curves using this data are presented in Figure 4. Our light curve analysis shows that only two fundamental frequencies are present, corresponding to the orbital period and a modulation with twice this frequency. We determine the accurate ephemeris of the system to be HJD_eclipse_=2454967.6750(1)+0.06531866661(1)E. A double-hump orbital period modulation, a standing feature in several bounce-back systems at quiescence, is present at several epochs. However, we found no other evidence to support the hypothesis that this system belongs to the post-minimum orbital-period systems.2013A&A...554A..25Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/554/A25CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/554/A25https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/554/A25http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/554/A25https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/554/A25https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/554/A25http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/554/A25GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/554/A25/table1Log of photometric observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUTCUniversal Time Date of photometric nighttime.epochnullableHJDoHeliocentric Julian Date of first exposuredtime.epochdoubleHJDfHeliocentric Julian Date of last exposuredtime.epochdoubleNExpNumber of exposures takenmeta.numberintExpTExposure time of each observationstime.duration;obs.exposureintJ/A+A/554/A25/fig4Photometric observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of exposure (UTC)dtime.epochdoubleDmagDifferential magnitude (white light)magphot.mag;arith.difffloatRun[1/6] Observation run numbermeta.record;obs.param;obsint