RESULTS FROM A SURVEY OF GRAVITATIONAL MICROLENSING TOWARD M31

We describe the results of a search for microlensing events affecting stars in the outer bulge and inner disk of M31, due both to masses in M31 and the Galaxy. These observations, from 1994 and 1995 on the Vati can Advanced Technology Telescope and KPNO 4 m telescope, are sufficie nt to rule out masses in the range similar to 0.003-0.08 M. as the pri mary constituents of the mass of M31 toward this field. Furthermore, w e find six candidate events consistent with microlensing as a result o f masses of about 1M., but we suspect that some of these may be cases in which long-period red supergiant variables may be mistaken for micr olensing events. Coverage from anticipated data should be helpful in d etermining whether these sources maintain a constant baseline, and the refore they are best described by microlensing events.