[vsnet-grb-info 8220] GRB 090807, RIMOTS optical upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9747
SUBJECT: GRB 090807, RIMOTS optical upper limits
DATE:    09/08/07 16:43:17 GMT
FROM:    Kenta Kono at Miyazaki U  <kenta0514 at 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
GRB 090807 (Swift trigger 359378, GCN 9746, J. K. Cannizzo et al.)
with the unfiltered CCD camera on the 30-cm telescope
at University of Miyazaki.
The observation was started 15:04:25 UT, about 2.2 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 9746, J. K. Cannizzo et al.)

the upper limits are as follows:
--------------------------------------------------------------
Start(UT)	 End(UT) $B!!!!(BNum. of frames $B!!(BLimit (mag.)
--------------------------------------------------------------
15:04:25 	15:04:55 	1 	12.6
15:04:25 	15:30:26 	19 	18.5
---------------------------------------------------------------