GCN Circular 4024
Subject
GRB 050922B: optical limit
Event
Date
2005-09-23T06:51:16Z (20 years ago)
From
Ken ichi Torii at RIKEN <torii@crab.riken.go.jp>
K. Torii (Osaka U.) reports:
The error region of Swift GRB 050922B (Norris et al. GCN 4008) was
observed by the 14 inch Automated Response Telescope. BVRcIc imaging
started at 2005 September 22, 15:07:42 UT (342 s after the trigger)
and 60 s integration was repeated.
Due to low transparency and intermittent clouds, useful images were
obtained after 15:16:47 UT. Preliminary analysis gives the following
3-sigma upper limits for an optical counterpart of the Swift XRT
afterglow (GCN 4008).
------------------------------------------
StartUT Filter Limit Exposure
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15:17:55 Rc 15.5 60s
17:02:44 Ic 17.1 40x60s
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