J/MNRAS/454/123ivo://CDS.VizieR/J/MNRAS/454/123doi:10.26093/cds/vizier.74540123CDSOchner P.Moschini F.Munari U.Frigo A.2024-08-15T20:15:41Z2016-09-16T07:50:31ZCDS support team

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

cds-question@unistra.frnovaecataclysmic-variable-starsinfrared-photometryvisible-astronomybroad-band-photometryWe present optical spectroscopy collected at seven epochs and BVRcIc photometry obtained at 1227 epochs of nova V723 Cas, covering the time interval between 2007 and 2015. The mean magnitude during this period, stable at ~3mag brighter than in quiescence, and the continuous presence of strong [FeX] and other high-ionization emission lines, indicates that the nuclear burning at the surface of the white dwarf is continuing 20-years past the initial outburst. The light curve shows a large amplitude (2mag) orbital modulation, which is governed by the visibility of the irradiated side of the secondary star. Our observations do not confirm the reported increase with time of the orbital period of V723 Cas, a period of P=16.638383+/-0.000025h satisfying equally well all available observations in all bands. Our observations also do not confirm the presence of an additional periodicity around P=15.2397h from which V723 Cas was classified as an intermediate-polar system.2015MNRAS.454..123Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/454/123CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/454/123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/454/123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/454/123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/454/123https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/454/123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/454/123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 4.920466254354166e-19OpticalInfrareddefaultJ/MNRAS/454/123/table2Our 2007 November-2015 March BVR_C_I_C_ CCD photometry of V723 Case_Vmag? rms uncertainty on Vmag (1)magstat.error;phot.mag;em.opt.VfloatnullableRcmag? Cousins R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rcmag? rms uncertainty on Rcmag (1)magstat.error;phot.mag;em.opt.RfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleObs.dateObservation datetime.epoch;obsnullableBmag? Johnson B magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? rms uncertainty on Bmag (1)magstat.error;phot.mag;em.opt.BfloatnullableVmag? Johnson V magnitudemagphot.mag;em.opt.VfloatnullableIcmag? Cousins I magnitudemagphot.mag;em.opt.Ifloatnullablee_Icmag? rms uncertainty on Icmag (1)magstat.error;phot.mag;em.opt.IfloatnullableTelTelescope IDmeta.id;instr.telchar