J/AJ/156/12ivo://CDS.VizieR/J/AJ/156/12doi:10.26093/cds/vizier.51560012CDSRucinski S.M.Pigulski A.Popowicz A.Kuschnig R.Kozlowski S.,Moffat A.F.J.Pavlovski K.Handler G.Pablo H.Wade G.A.Weiss W.W.,Zwintz K.2019-02-01T10:53:24Z2019-01-15T09:23:30ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryvisible-astronomyPhotometric instabilities of {beta} Lyrae ({beta} Lyr) were observed in 2016 by two red-filter BRITE satellites over more than 10 revolutions of the binary, with ~100 minute sampling. Analysis of the time series shows that flares or fading events take place typically three to five times per binary orbit. The amplitudes of the disturbances (relative to the mean light curve, in units of the maximum out-of-eclipse light flux, f.u.) are characterized by a Gaussian distribution with {sigma}=0.0130+/-0.0004 f.u. Most of the disturbances appear to be random, with a tendency to remain for one or a few orbital revolutions, sometimes changing from brightening to fading or the reverse. Phases just preceding the center of the deeper eclipse showed the most scatter while phases around the secondary eclipse were the quietest. This implies that the invisible companion is the most likely source of the instabilities. Wavelet transform analysis showed the domination of the variability scales at phase intervals 0.05-0.3 (0.65-4 days), with the shorter (longer) scales dominating in numbers (variability power) in this range. The series can be well described as a stochastic Gaussian process with the signal at short timescales showing a slightly stronger correlation than red noise. The signal decorrelation timescale, {tau}=(0.068+/-0.018) in phase or (0.88+/-0.23) days, appears to follow the same dependence on the accretor mass as that observed for active galactic nucleus and quasi-stellar object masses five to nine orders of magnitude larger than the {beta} Lyr torus-hidden component.2018AJ....156...12Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/156/12CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/110/1350 : Beta Lyrae light curve changes (Van Hamme+ 1995)J/A+A/312/879 : Beta Lyr radial velocities and UBV data (Harmanec+, 1996)J/A+A/463/233 : UBV and radial velocity light curves of beta Lyr (Ak+, 2007)J/ApJ/750/59 : BVR polarimetric observations of {beta} Lyr (Lomax+, 2012)J/A+A/618/A112 : {beta} Lyr light curves (Mourard+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/156/12https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/156/12http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/156/12https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/156/12https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/156/12http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/156/12GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/156/12/table3The mean light curve of {beta} LyrrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[0.00492/0.99511] Mean fractional phase of {beta} Lyr, {Phi} (G1)time.phasedoubleFluxmean[0.50429/1.00091] Mean flux calculated per interval of 0.01 in phasephot.flux.density;em.optdoublee_Fluxmean[0.00172/0.00917] Error computed from the spread of measurements (1)stat.errordoubleo_Fluxmean[12/20] Number of flux measurementsmeta.numberintJ/AJ/156/12/table5The equal-step {delta} seriesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintd1[-0.04874/0.04311] Flux deviation for un-corrected series {delta}_1_ (1)stat.errordoubled2[-0.05012/0.03332] Flux deviation for trend-corrected series {delta}_2_ (1)stat.errordoubleCode[0/2]? Measurement code (2)meta.codeintnullableJ/AJ/156/12/table2The satellite-orbit average datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintt[1520.1052/1651.97] Mean time for the satellite-orbit average data (HJD-2456000)dtime.epochdoublePhase[0.11435/10.3019] Orbital phase of {beta} Lyr, {Phi} (G1)time.phasedoubleFlux[0.46531/1.03572] Relative flux (1)phot.flux;arith.ratiodoublee_Flux[0.00035/0.0058] Error computed from the spread of measurements (2)stat.error;phot.fluxdoubleo_Flux[8/75] Number of flux measurementsmeta.numberintCode[1/3] Satellite/setup code (3)meta.codeint