Abstract:
M 31 has been a promising target to search for microlensing events. Consequently a number of groups have started observations towards this galaxy, however, analyzing the observations in the large background of unresolved stars is a cumbersome process. To deal with the problem, AGAPE (Baillon et al. 1993) collaboration propsed pixel technique to monitor pixels of the CCD rather than the stars themselves. To search for microlensing events, we have also started CCD observations in the direction of M31 at the State Observatory, Naini Tal in 1999 using 2Kx2K CCD at the f/13 Cassegrain focus of 104-cm Sampurnanand Telescope. An overview of the observations and data reduction are given in Joshi et al. (2001, 2003) and the details of 'pixel technique' is described by Ansari et al.(1997)