Dear Colleagues- The MACHO project has detected a candidate microlensing event in progress towards the Galactic bulge. Event 99-BLG-39 Star ID 152.26580.3637 RA (J2000) 18:18:18.8 DEC (J2000) -30:45:21 V ~20.8 R ~20.0 A_red ~1.7, A_blue ~2.9 and possibly falling on 22 Jun, strong blend in Red (f ~0.4), duration 10 +/- 1 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.