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                       PLANET ANOMALY ALERT
                             2006 #10
                    (issued 18-Jul, 13:45 UT)
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	    OGLE 2006-BLG-398 underwent caustic exit


Dear Colleagues,

triggered by OGLE pointing to an anomalous rise in OGLE 2006-BLG-398 by
0.35 mag during one night, PLANET collected data with the Canopus 1.0m
(near Hobart, Tasmania) after HJD=2453934.913 (18-Jul, 9:55 UT).
While the first three points show a rise by 0.35 mag during 1.6 hrs at
increasing slope, the fourth point is about 0.9 mag below the preceding
one.

Together with the previous OGLE data, the observations appear to follow the
characteristic rise to a caustic exit for a small, strongly blended source.
Since for faint stars, microlensing essentially works as a caustic-crossing
detector, such light curves are not unusual.

A light curve plot as well as data are available on our webpages.

Event:           OGLE 2006-BLG-398
RA (J2000):      18:04:12.274
Dec (J2000):     -28:47:39.4

The baseline I magnitude reported by the OGLE team is 18.021 +/- 0.001.

PLANET observers:
Canopus 1.0m:	Cyril Pitrou, Mark Huber

For more information:
PLANET:            http://planet.iap.fr
OGLE:		   http://ogle.astrouw.edu.pl

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On behalf of the PLANET/RoboNet team,

Martin Dominik

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