TITLE:   GCN CIRCULAR
NUMBER:  10257
SUBJECT: GRB 091208B, RIMOTS optical upper limits  
DATE:    09/12/08 11:57:37 GMT
FROM:    Kazuhiro Noda at Miyazaki U  <kaz1206@astro.miyazaki-u.ac.jp>

K.Noda, K.Kono, 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
GRB GRB091208B (Swift trigger 378559, GCN 10256, C. Pagani et al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 09:59:30 UT, about 9.5 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 10255, A. de Ugarte Postigo et al.)

the upper limits are as follows:
--------------------------------------------------------------
Start(UT) End(UT) Num. of frames Limit (mag.)
--------------------------------------------------------------
09:59:30 10:00:00 1 15.9
09:59:30 10:47:23 37 17.3
---------------------------------------------------------------