GCN Circular 9115
Subject
GRB090408, RIMOTS optical upper limits
Date
2009-04-09T09:40:27Z (16 years ago)
From
Kenta Kono at Miyazaki U <kenta0514@astro.miyazaki-u.ac.jp>
K.Kono, E.Sonoda, N.Ohmori, H.hayasi,
A.Daikyuji, Y.Nisioka, K.Noda, M.Yamauchi
(University of Miyazaki)
We have observed the field covering the error circle of
GRB090408 (Swift trigger 348720, GCN 9110, M.C.Stroh et al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 15:05:13 UT (2 min. after the Swift trigger),
under cloudy condition.
First analyzable image was obtained at 15:16:52 UT (14 min. after the Swift trigger).
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 9110,M.C.Stroh et al.)
the upper limits are as follows:
--------------------------------------------------------------
Start(UT) End(UT) Num. of frames Limit (mag.)
--------------------------------------------------------------
15:16:52 15:17:22 1 13.5
15:16:52 15:33:25 14 16.5
---------------------------------------------------------------