GCN Circular 4113
Subject
GRB 050502b: Optical limit
Event
Date
2005-10-19T04:41:38Z (20 years ago)
From
Ken ichi Torii at RIKEN <torii@ess.sci.osaka-u.ac.jp>
K. Torii (Osaka U.) reports on behalf of the ART collaboration:
The error region of the bright GRB 050502b (Falcone et al. GCN 3330)
was observed by the 14 inch Automated Response Telescope. Ic band
imaging was started at 2005 May 2 10:19:30 UT (54 minutes after the
burst) and 60s exposure was repeated.
The optical afterglow (Rich et al. GCN 3338) is not detected in our
frames and the following 3-sigma upper limit is derived for a stacked
image.
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StartUT-EndUT Filter Limit Exposure
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10:55:59-13:00:20 Ic >18.6 87x60s
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