J/AJ/140/483ivo://CDS.VizieR/J/AJ/140/483doi:10.26093/cds/vizier.51400483CDSDal H.A.Evren S.2017-11-28T13:21:26Z2012-08-22T12:09:58ZCDS support team

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

cds-question@unistra.frvariable-starsphotometryIn this study, a new method is presented to classify flares derived from the photoelectric photometry of UV Ceti type stars. This method is based on statistical analyses using an independent samples t-test. The data used in analyses were obtained from four flare stars observed between 2004 and 2007. The total number of flares obtained in the observations of AD Leo, EV Lac, EQ Peg, and V1054 Oph is 321 in the standard Johnson U band. As a result flares can be separated into two types, slow and fast, depending on the ratio of flare decay time to flare rise time. The ratio is below 3.5 for all slow flares, while it is above 3.5 for all fast flares. Also, according to the independent samples t-test, there is a difference of about 157 s between equivalent durations of slow and fast flares. In addition, there are significant differences between amplitudes and rise times of slow and fast flares.2010AJ....140..483Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/483CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/140/483https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/140/483http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/140/483https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/140/483https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/140/483http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/140/483GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/140/483/stars (Basic parameters for the targets studied)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/140/483/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/140/483/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/140/483/stars?GETtext/xml+votable180.050000true154.901166719.87002780.0055555555555555566/4444 13743 20071 30833https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/140/483?format=asciiOpticaldefaultJ/AJ/140/483/starsBasic parameters for the targets studiedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V colour indexmagphot.color;em.opt.B;em.opt.VfloatSpTypeMK spectral typesrc.spTypecharDistDistancepcpos.distance;pos.heliocentricfloatlogLbolBolometric luminositylog(solLum)phys.luminosityfloatFile[fig1-4] figure ID, in "fits" subdirectorymeta.bib.figcharSimbadSimbad column added by the CDSmeta.refcharJ/AJ/140/483/table3Parameters computed from observed flaresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharObs.DateDate of Observationtime.epochnullableHJDHeliocentric Julian date of flare maximum momentdtime.epochdoubleTTimeTotal flare timestime.epochintDTimeFlare decay timestime.epochintDurEquivalent durationstime.durationdoubleEnergyFlare energy1e-07Jphys.energydoubleUmagFlare amplitude in U bandmagsrc.var.amplitudefloatType[Slow Fast] Flare type ("Slow" or "Fast")meta.codecharUsed[Yes No] Used in analysis ?meta.codechar