TITLE: GCN CIRCULAR NUMBER: 13016 SUBJECT: GRB 120305A: D50 optical limits DATE: 12/03/07 15:37:04 GMT FROM: Jan Strobl at AI AS CR,Ondrejov Jan Strobl (1), Martin Jelinek (2), Cyril Polasek (1), Martin Nekola (1), Martin Blazek (1), Petr Kubanek (3) and Rene Hudec (1) (1. ASU AVCR Ondrejov, 2. IAA-CSIC Granada, 3. FZU AVCR) We observed the field of Swift GRB 120305A (Stratta et al., GCNC 13004) with the 0.5m telescope D50 in Ondrejov (Czech Republic), starting at 19:39:12.6UT i.e. 102.6s after the trigger. A sequence of 20s unfiltered images was obtained. We do not detect any new source in individual (limit Rc~17.5) nor coadded images (limit Rc~19.2). This message can be cited.