GCN Circular 14769

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
Not found
 
 
). 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).