Optical monitoring of GM Sgr and discovery of a Mira and a short-period pulsator

Abstract

This Note is the third in a series of Notes where we report new variable stars discovered during our extensive CCD monitoring program of the black hole binary V 4641 Sgr (SAX J1819.3-2525, Orosz et al. 2001). In this Note we report on the discovery of a Mira and a short-period pulsating star. We also give the light curves of GM Sgr, a previously known Mira (Orosz 2000, Kato et al. 2001).