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Microlensing searches toward the inner galaxy (|l|,|b|≤ 22.-2pt'5) have several major advantages. First, the event rate is strongly dominated by bulge-bulge lensing events where both the source and lens lie in the bulge. Second, these bulge-bulge events have very short time scales t_e∼ 2 days and are therefore easily distinguished from the less frequent and much longer bulge-disk and disk-disk events. Third, since the optical depth is similar to that at higher impact parameters, while thedoi:10.1086/187933 fatcat:s3jty24qkfaujpgonboy6urghe