14 years of photometric monitoring of MM Dra and a suspected variable in the field of blazar 1ES 1959+650

Hicks, S. and Laney, C.D. and Carini, M.T. and Richardson, W.N. and Antoniuk, K. and Pit, N. (2017) 14 years of photometric monitoring of MM Dra and a suspected variable in the field of blazar 1ES 1959+650. Information Bulletin on Variable Stars, 63 (6222). ISSN 1587-2440

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Abstract

We present a 14 year photometric study of one confirmed and one suspected variable star in the field of the TeV blazar 1ES 1959+650. Both stars have previously been used as comparison stars for the blazar 1ES 1959+650, and are identified as star 3 and star 5 by Villata et. al. (1998). Star 5 is also known as MM Dra and is an eclipsing binary of the EW UMa type, exhibiting evidence of the O'Connell effect. A very recent calibration based on Gaia parallaxes suggests a distance of about 600 pc. Star 3 is a variable star of undetermined type and a color analysis suggests it is a late K or early M type star.

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