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GCN Circular 8697

Subject
GRB081222, optical observation
Date
2008-12-22T13:43:55Z (15 years ago)
From
Norisuke Ohmori at Miyazaki U <ohmori@astro.miyazaki-u.ac.jp>
E.Sonoda, H.Tanaka, R.Hara, N.Ohmori, K.Kono, H.hayasi, 
A.Daikyuji, K.Noda, Y.Nisioka, M.Yamauchi
(University of Miyazaki)


 We have observed the field covering the error circle of
GRB081222 (Swift trigger 337914, Grupe et al., GCN 8691) 
with the unfiltered CCD camera on the 30-cm telescope 
at University of Miyazaki.
The observation was started 08:41:19 UT, about 3.78 hr
after the Swift trigger time.
We have compared our data of 30 sec exposures
with the USNO-A2.0 catalog,
the upper limits are as follows:
--------------------------------------------------------------
Start(UT)   End(UT)    Num. of frames    Limit (mag.)
--------------------------------------------------------------
10:36:04    10:36:19          1            ~16
10:36:04    10:49:52         12            ~17
---------------------------------------------------------------
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