[AAVSO-HEN] GRB080503, RIMOTS optical upper limit

[grb at aavso.org]

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TITLE:   GCN CIRCULAR
NUMBER:  7691
SUBJECT: GRB080503, RIMOTS optical upper limit
DATE:    08/05/07 07:44:10 GMT
FROM:    Hiroki Tanaka at U of Miyazaki  <hiro0218 at astro.miyazaki-u.ac.jp>

H. Tanaka, N. Ohmori, H. Hayasi, R. Hara, K. Kono, M. Yamauchi
(University of Miyazaki)

We have observed the field covering the error circle of
GRB080503 (GCN 7669, M.R. Goad et al.) with
the unfiltered CCD camera on the 30-cm telescope at
University of Miyazaki.
The observation was started 15:25:55 UT; about 180 minutes
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

the upper limits are as follows:
--------------------------------------------------------------
Start(UT) End(UT)	Num. of frames 	Limit (mag.)
--------------------------------------------------------------
15:26:57 15:27:27 	1 		~16.82
15:26:57 16:24:33 	57 		~17.43
---------------------------------------------------------------