Photometric study of the WUMa-type eclipsing binary system GSC 4832.400

We present a photometric analysis of the eclipsing binary system GSC4832.400 based on 732 photometric observations obtained on sixteen clear nights during 1999-2000 in the V-Johnson and yb-Stromgren filters. The observed times of the minima yielded a linear ephemeris showing that the system has a constant period of 0.313150 +/- 0.000002 days. The light curve corresponds to a circular orbit for the system and clearly shows that GSC4832.400 has the defining characteristics of a W UMa-type eclipsing binary. It also shows a small O'Connell effect, which could be due to the presence of a hot spot in the primary star. A preliminary photometric solution based on the assumption of an overcontact system satisfactorily reproduced the observed light curve.