ANOMALY ALERT
Anomaly in OGLE 99-BLG-023

First posted: 16-Jun-1999
Updated: 16-Jun-1999

The PLANET collaboration has detected an anomaly in the on-going microlensing event OGLE-1999-BUL-23. Recent PLANET observations from Chile and South Africa indicate that this event brightened by apprximately 1.3 magnitudes in 7 hours on about JD 2451341.6, then apparently fell and has now risen again. The event is currently A~7.5. Future behaviour is uncertain and further observations are strongly encouraged. An anomaly alert was issued.

Event:                  OB-99-023
RA (J2000):         18:07:45.14
Dec (J2000):     -27:33:15.4

The baseline I magnitude reported by the OGLE team is 17.85.

PLANET continues to observe this event. Observations by others, both photometric and spectrographic, are encouraged. A postscript finding chart can be downloaded here.

Finding charts and future updated information can be found on the PLANET web site at http://planet.iap.fr.

OGLE information on this event can be found at the OGLE alert web page at: http://www.astrouw.edu.pl/~ftp/ogle/ogle2/ews/bul-23.html.


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