Four August 2009 Novae in M31 - Light Curves, Colours and MMRD

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Scientific paper

This work is the second one of a series of papers based on observations, carried out by the Bulgarian novae search team (Valcheva et al. 2009). Here we present photometry and astrometry of four novae in the M31 galaxy, discovered in August 2009, one of them by us. The observations were performed in period of 11 nights in the second half of August with the 50/70 cm Schmidt telescope and 60 cm Cassegrain telescope at AO Belogradchik, respectively. The available data (optical and spectroscopic) from other sources are also included. Finding charts and light curves in several pass- bands (BVR) are presented. The times of decline (t_2) are estimated and the Maximum Magnitude - Rate of Decline relationship (MMRD) is constructed.

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