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GCN Circular 9637

GRB 090709A, RIMOTS optical upper limits
2009-07-09T21:16:12Z (15 years ago)
Kenta Kono at Miyazaki U <>
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
GRB090709A (Swift trigger 356890, GCN 9625, D.C.Morriset al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 11:42:32 UT (4.1 hr after the Swift trigger),
under cloudy condition.
First analyzable image was obtained at 16:18:26 UT (8.8 hr 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 9634, K.Aoki et al. GCN 9636, J.P.Osborne et al.)

the upper limits are as follows:
Start(UT) End(UT) Num. of frames Limit (mag.)
16:18:26 16:18:56 1 13.6
16:18:26 18:39:38 38 16.4
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