TITLE: GCN CIRCULAR NUMBER: 4660 SUBJECT: GRB 060204B: ART optical limit DATE: 06/02/04 17:14:52 GMT FROM: Ken ichi Torii at RIKEN K. Torii (Osaka U.) reports on behalf of the ART collaboration: The error region of GRB 060204B (Falcone et al. GCN 4655) was imaged with the 0.35m ART 3b telescope in Toyonaka, Osaka. From a stacked frame (60s x 20 in Ic), the following 3 sigma limit is derived for an optical counterpart of the XRT source (GCN 4655), with reference to USNO-B1.0 I magnitude. ----------------------------- StartUT Limits ============================= 14:59:31 >18.0I =============================