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GCN Circular 9391

Subject
GRB 090516, RIMOTS optical upper limits
Date
2009-05-18T13:29:42Z (15 years ago)
From
Norisuke Ohmori at Miyazaki U <ohmori@astro.miyazaki-u.ac.jp>
N. Ohmori, E. Sonoda, K. Kono, H. hayasi,
A. Daikyuji, Y. Nisioka, K. Noda, M. Yamauchi
(University of Miyazaki)

We have observed the field covering the error circle of
GRB090516 (Swift trigger 352190, GCN 9374, Rowlinson et al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 11:16:08 UT (1.8 hr after the Swift trigger),
under cloudy condition.
First image was obtained at 11:17:11 UT (1.8 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 9374, B. A. Rowlinson et al. GCN 9375, C. Guidorzi et al. 
 GCN 9376, A. P. Beardmore et al. GCN 9379, J. Gorosabel et al. 
 GCN 9381, A. de Ugarte Postigo et al.)

the upper limits are as follows:
---------------------------------------------------------------
Start(UT)  End(UT) Num. of frames Limit (mag.)
---------------------------------------------------------------
11:16:08   11:17:11         1         15.6
11:16:08   12:04:00        21         17.7
---------------------------------------------------------------
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