GCN Circular 7379
Subject
GRB080307, optical upper limit
Event
Date
2008-03-10T06:59:51Z (18 years ago)
From
Hiroki Tanaka at U of Miyazaki <hiro0218@astro.miyazaki-u.ac.jp>
H. Tanaka, R. Hara, K.Kono, N.Ohmori, H.hayasi, M.Yamauchi, E.Sonoda
(University of Miyazaki)
We have observed the field covering the error circle of
GRB080307 (GCN 7366, M.R. Goad et al.) with
the unfiltered CCD camera on the 30-cm telescope at
University of Miyazaki.
The observation was started 11:25:17 UT,
but it was cloudy then,so we got first image at 13:44:43 UT, ~141 min
after the Swift trigger time.
We have compared our data of 30 sec exposures
with the USNO-A2.0 catalog,there is no new source
at the reported position (GCN 7369, N. R. Tanvir)
the upper limits are as follows:
--------------------------------------------------------------
Start(UT) End(UT) Num. of frames Limit (mag.)
--------------------------------------------------------------
14:01:59 14:02:29 1 ~16.36
14:01:59 17:26:12 20 ~16.99
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