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Paper: Evidence of optical flares in quiescent SXTs
Volume: 261, The Physics of Cataclysmic Variables and Related Objects
Page: 573
Authors: Zurita, C.; Casares, J.; Shahbaz, T.
Abstract: We present the results of optical fast photometry of five SXTs in quiescence: V404 Cyg, A 0620--00, J 0422+32, GS 2000+25 and Cen X--4 and report the evidence of fast optical variations with timescales from minutes to a few hours and amplitudes from 0.06 to 0.6 mag, superimposed on the classical ellipsoidal light curve. We find no coherent periodicity. The physical origin of this variability is unknown although we favour an origin in the accretion disc.
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