J/AJ/147/10ivo://CDS.VizieR/J/AJ/147/10doi:10.26093/cds/vizier.51470010CDSHoneycutt R.K.Kafka S.Robertson J.W.2017-06-20T13:17:31Z2014-08-27T14:19:01ZCDS support team

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

cds-question@unistra.frvariable-starscataclysmic-variable-starsphotometryThe 1990-2012 light curve of the nova-like (NL) cataclysmic variable V794 Aql is studied in order to characterize and better understand the transitions to and from the faint state, and the variations within the bright state. Investigations of earlier portions of this data had concluded that the transitions to the low state were much slower than the rapid recovery, giving a sawtoothed appearance to the light curve. This behavior differs from that of most other VY Scl stars, which led to an interpretation of the large amplitude sawtooths as being due to an accretion disk (AD) instability. However, more recent photometry strongly suggests that the bright state itself has transitions of 1-1.5mag, and that earlier studies had intermixed these bright state variations with the transitions to the low state. These newly recognized variations within the bright state sometimes appear as small outbursts (OBs) with typical amplitudes of 0.5-1.5mag and spacings of ~15-50days. The rise times of the OBs are 2-3 times faster than the decline times. We argue that the V794 Aql bright state variations are due to AD behavior similar to that seen in dwarf novae, but with varying degrees of stability. Similar regular small OBs have also been reported in other NL CVs, which we compare with V794 Aql. The true deep low states in V794 Aql appear to be normal, having transition speeds and shapes very similar to the transitions in other VY Scl stars.2014AJ....147...10Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/147/10CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/PASP/125/126 : Light curve of CR Boo over 1990-2012 (Honeycutt+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/147/10https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/147/10http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/147/10https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/147/10https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/147/10http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/147/10GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.322582951404819e-19 3.852589004194616e-19OpticaldefaultJ/AJ/147/10/table1V794 Aql photometry by observing campaignrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintC[A-E] Campaign code (1)meta.id;obscharprimaryTel[0.41/1.25] Telescope size (0.41 or 1.25)minstr.telfloatCamCCD camera typemeta.id;instrcharYear0Year of observation (start)yrtime.epochintYear1Year of observation (end)yrtime.epochintNexp[61/1194] Number of usable exposuresmeta.numberintNstar[78/171] Number of field stars in the ensemble solutionmeta.numberint<Err>[0.02/0.024] Mean error of the variablemagstat.errorfloatNstd[9/10] Number of secondary standards used (2)meta.numberintErr[0.004/0.005] Error in the light curve zero point using the secondary standardsmagstat.errorfloatJ/AJ/147/10/table2V794 Aql light curve datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[2448208/2456252] Julian Date of the observationdtime.epochdoubleVmagThe V band magnitudemagphot.mag;em.opt.Vfloate_VmagError in Vmagmagstat.error;phot.mag;em.opt.VfloatC[A-E] Campaign code (see Table1)meta.id;obschar