TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3232 SUBJECT: GRB 050408: Optical limit DATE: 05/04/11 06:39:05 GMT FROM: Ken ichi Torii at RIKEN K. Torii (Osaka U.) reports "The error region of GRB 050408 (Sakamoto, et al. GCN 3189) was observed by the ART 14-inch telescope. BVRcIc imaging started at 2005 April 8, 16:23:48 UT (57-s after trigger) and 60-s exposure in each filter was repeated. The optical afterglow (de Ugarte Postigo, et al. GCN 3192) is not detected in our frames and the following 3-sigma upper limits are derived relative to USNO-A2.0 (R). MeanEpoch(UT) Magnitude Exposure 16:24:18 >16.2Rc 60s 16:28:50 >16.2Rc 60s 16:33:22 >17.0Rc 60sx5 "