TITLE: GCN CIRCULAR NUMBER: 8697 SUBJECT: GRB081222, optical observation DATE: 08/12/22 13:43:55 GMT FROM: Norisuke Ohmori at Miyazaki U E.Sonoda, H.Tanaka, R.Hara, N.Ohmori, K.Kono, H.hayasi, A.Daikyuji, K.Noda, Y.Nisioka, M.Yamauchi (University of Miyazaki) We have observed the field covering the error circle of GRB081222 (Swift trigger 337914, Grupe et al., GCN 8691) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 08:41:19 UT, about 3.78 hr after the Swift trigger time. We have compared our data of 30 sec exposures with the USNO-A2.0 catalog, the upper limits are as follows: -------------------------------------------------------------- Start(UT) End(UT) Num. of frames Limit (mag.) -------------------------------------------------------------- 10:36:04 10:36:19 1 ~16 10:36:04 10:49:52 12 ~17 ---------------------------------------------------------------