GCN Circular 9079
Subject
GRB090401B, RIMOTS optical upper limits
Date
2009-04-02T05:17:04Z (16 years ago)
From
Kenta Kono at Miyazaki U <kenta0514@astro.miyazaki-u.ac.jp>
K.Kono, K.Noda, E.Sonoda, N.Ohmori, H.hayasi,
A.Daikyuji, Y.Nisioka, M.Yamauchi
(University of Miyazaki)
We have observed the field covering the error circle of
GRB090401B (Swift trigger 348152, GCN 9066, Schady et al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 10:47:10 UT, about 1.8 hr
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 9068, Stamatikos et al. GCN 9070, Osborne et al. )
the upper limits are as follows:
--------------------------------------------------------------
Start(UT) End(UT) Num. of frames Limit (mag.)
--------------------------------------------------------------
11:41:47 11:42:17 1 16.8
11:41:47 12:32:21 43 17.7
---------------------------------------------------------------