TITLE: GCN CIRCULAR NUMBER: 14769 SUBJECT: GRB 130603B: AMI-LA 15GHz observations DATE: 13/06/05 11:38:07 GMT FROM: Tim Staley at U of Southampton T.D. Staley, G.E. Anderson, R.P. Fender (U. of Southampton), A. Rowlinson, A.J. van der Horst (U. of Amsterdam), D.J. Titterington, C. Rumsey (MRAO) report on behalf of the 4 Pi Sky / AMI team: We have observed the position of the GRB 130603B afterglow at multiple epochs with the AMI Large Array at 15 GHz. Our initial observation was for one hour starting at 15:53:42 UT on June 3rd, just under 5 minutes after the GRB trigger time (GCN 14735). We also made longer observations, at 3.12 and 22.8 hours post-burst. We do not detect the afterglow in our preliminary reductions. Preliminary analysis gives 3-sigma upper limits as follows: Start (Hrs post burst) | Duration (hrs) | 3-sigma upper limit --------------------------------------------------------------------- 0.08 | 1 | 0.6 mJy 3.12 | 3 | 0.21 mJy 22.8 | 3 | 0.3 mJy Further observations are scheduled. These observations were initially triggered via the system described in Staley et. al (2013, MNRAS, 428, 3114).