From planet@astro.rug.nl Tue Jun  1 01:48:41 MET 1999
Subject: PLANET ANOMALY ALERT: OGLE 99-BLG-11

Dear Colleagues:

The PLANET collaboration has detected an anomaly in the on-going 
microlensing event OGLE 1999-BUL-11. The OGLE collaboration has
previously alerted the possible binary nature of this event.
Recent PLANET observations show a brightening of 50% over 
the past 9 days, with a curvature that suggests a rise toward 
a second caustic crossing.  If this interpretation is correct,
we predict that this crossing is likely to occur near 
JD=2451334 +/- 2, although the future behaviour of this event 
is still quite uncertain.  OGLE reports a baseline magnitude of 
I=18.5 for this event, which is currently brighter by a 
factor of three over this baseline value.

Event:		 OGLE 1999-BUL-11
RA  (J2000):	 18:05:29.59
Dec (J2000):	-27:59:14.4

Observations, both photometric and spectrographic are encouraged. 
Finding charts and future update information can be found on the 
PLANET web page at:

http://www.astro.rug.nl/~planet.

OGLE information on this event can be found at the OGLE alert 
web page at:  http://www.astrouw.edu.pl/~ftp/ogle/ogle2/ews/ews.html