CAOSP abstracts, Volume: 36, No.: 2, year: 2006

Abstract: We report on a search for activity-induced variability in two eclipsing systems SV Cam, RZ Tau and a single lined spectroscopic binary II Peg in the winter season 2004/2005. The SV Cam system was modelled with two activity centers-spots on the primary cooler than the surrounding photosphere with total spot coverage ∼20%. On the contrary, the RZ Tau system (its Roche lobe filling factor of order 0.42) displays symmetric light curves and no O'Connell effect is detected. The shape of the II Peg light curve can not be matched easily with a single spot model. Instead, a two spot model (alternatively a non-uniform high latitude spot complex) cooler than the photosphere can model the observed light curves with spot coverage ∼10%.