MICROLENSING MAPS FOR THE GALACTIC BULGE

Microlensing maps-that is, contours of equal numbers of events per 10(6) source stars-are provided for the inner Galaxy under two alternative hypotheses: (1) the bulge is an oblate axisymmetric spheroid or (2) the bulge is a prolate bar. Oblate spheroids yield a total of similar to 11 events per year per 10(6) stars at Baade's window (similar to 14 events if the disk is maximal). The event rate is slightly lower for prolate bars viewed at similar to 45 degrees and the maps have a characteristic asymmetry between positive and negative longitudes. Prolate bars can yield mild amplifications of the event rate if viewed almost down the long axis. The disk provides the dominant lensing population on the bulge major axis for \l\ greater than or similar to 6 degrees. Measurements of the rate at major-axis windows can test for disk dark matter or maximal disk models.