TITLE: GCN CIRCULAR NUMBER: 8306 SUBJECT: GRB081001: optical limit from ASH-Centurion DATE: 08/10/02 02:24:13 GMT FROM: Martin Jelinek at Inst.Astrophys.Andalucia,Granada Martin Jelinek, Rene Duffard, Pablo Santos Sanz and Alberto J. Castro Tirado (IAA CSIC Granada) report on behalf of a larger collaboration: We observed the errorbox of the SuperAGILE GRB081001 (Lazzarotto et al., GCN 8305) with the 40cm ASH-Centurion telescope at Cerro Burek in Argentina starting at 23:28 UT. The combined 600s unfiltered image with exposure mid-time 2.30h after the GRB trigger does not reveal any new source down to limiting magnitude of ~19.0 in comparison to the Digitized Sky Survey. This message may be cited.