Dear Colleagues- The MACHO project has detected a candidate microlensing event in progress towards the Galactic bulge. Event 99-BLG-40 Star ID 114.20100.3068 RA (J2000) 18:03:11.3 DEC (J2000) -29:26:35 V ~19.8 R ~19.0 A ~1.6 and rising on 23 Jun, expected peak near 27 Jun, duration 14 +/- 10 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.