TITLE: GCN CIRCULAR NUMBER: 10252 SUBJECT: Short X-ray Transient, RIMOTS optical upper limits DATE: 09/12/08 02:09:31 GMT FROM: Arata Daikyuji at Miyazaki U A.Daikyuji, K.Noda, E.Sonoda, H.Hayasi, K.Kono, N.Ohmori, Y.Nishioka, M.Yamauchi (University of Miyazaki) We have observed a part of the error region of Short X-ray Transient detected by MAXI (GCN 10229, M. Nakajima et al.) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 20:22:04 UT. We have compared our data of 30 sec exposures with the USNO-A2.0 and GSC catalog. There is no new source at the reported position. The corners of observed region are as follows: (R.A., Dec)=(118.29 deg, 16.44 deg) = (07 53 11.00, +16 26 17.7) (J2000) (R.A., Dec)=(118.30 deg, 16.92 deg) = (07 53 12.70, +16 55 31.9) (J2000) (R.A., Dec)=(118.88 deg, 16.91 deg) = (07 55 30.80, +16 54 56.3) (J2000) (R.A., Dec)=(118.87 deg, 16.43 deg) = (07 55 29.30, +16 25 50.4) (J2000) The upper limits are as follows: ------------------------------------------------------------- Start(UT) End(UT) Num. of frames Limit (mag.) -------------------------------------------------------------- 20:43:14 20:43:44 1 14.0 20:22:04 21:00:21 30 16.6 ---------------------------------------------------------------