* Astronomy

Title: Surface Brightness Variation of the Contact Binary SW Lac: Clues From Doppler Imaging
Authors: H.V. Senavc

In this study, we present the preliminary light curve analysis of the contact binary SW Lac, using B, V light curves of the system spanning 2 years (2009 - 2010). During the spot modelling process, we used the information coming from the Doppler maps of the system, which was performed using the high resolution and phase dependent spectra obtained at the 2.1 m Otto Struve Telescope of the McDonald Observatory, in 2009. The results showed that the spot modelling from the light curve analysis are in accordance with the Doppler maps, while the non-circular spot modelling technique is needed in order to obtain much better and reliable spot models.

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