TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5410 SUBJECT: GRB 060807: optical limit DATE: 06/08/07 15:55:09 GMT FROM: Ken ichi Torii at Osaka U K. Torii (Osaka U.) reports on behalf of the ART collaboration: The error region of GRB 060807 (De Pasquale et al. GCN 5409) was observed with the 0.35m ART-3b in Toyonaka, Osaka. Under the bright moon, 60 s exposures in Ic band were repeated. Preliminary analysis does not reveal a new object within the XRT error region and the following upper limit is derived relative to USNO-B1.0 I magnitude. -------------------------------- StartUT Limit Exposure ================================ 14:44:37 >17.7 60s x 10 ================================