Dear Colleagues- The MACHO project has detected a candidate microlensing event in progress towards the Galactic bulge. Event 99-BLG-54 Star ID 403.47550.807 RA (J2000) 17:55:0.1 DEC (J2000) -29:35:04 V ~17.9 R ~16.8 A ~1.6 and rising on 03 Aug, expected peak of A ~1.9 on 05 Aug, duration 9 +/- 3 days. Finding charts and lightcurves are available on the web page at http://darkstar.astro.washington.edu or ftp site darkstar.astro.washington.edu directories macho/Alert/99-*. If you wish to no longer receive these bulletins please notify us at macho@astro.washington.edu.