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A photometric study of W UMa-type binary BC Gru
UBVR cIc light curves were obtained for the W UMa-type system BC Gru.Five times of minima were determined and ephemeris was derived. Anoptimization procedure aimed at solving binary light curves ispresented. An application to BC Gru data illustrates the operation ofthe method. The present analysis indicates that BC Gru is a contactbinary with the mass ratio of 1.77 +/- 0.49 and an inclination of 66.9+/- 2.8.
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