Pixel lensing experiment toward the M31 bulge

I demonstrate that one can detect pixel gravitational microlensing events at the rate similar to 180 events yr(-1) and that some fraction of events (similar to 15) will be good enough to measure timescales at the 20% level if the experiment is carried out toward the central M31 bulge region with a dedicated 1 m telescope and a 2K x 2K CCD. I show also that the event rate could be increased significantly (up to a factor 6.5) if more aggressive observation strategies are adopted. These aggressive strategies include multiple observation sites, using a bigger telescope, and reduction of seeing differences among images. A few years of observation could provide a data set large enough to extract important information about the M31 bulge such as the optical depth distribution, the mass spectrum of M31 MACHOs, and the luminosity function, which currently cannot be obtained by other methods. In addition, I find that the extinction of M31 bulge light by dust in the disk is not important and can be approximated by the model in which only 20% of light in Tr band is extinguished over most of the bulge area.