GCN Circular 16543
G. E. Anderson, R. P. Fender, T. D. Staley (University of Oxford), A. J. van der Horst (University of Amsterdam) and A. Rowlinson (CASS) We observed the position of GRB 140703A (GCN 16503) at 15 GHz with the Arcminute Microkelvin Imager (AMI-LA) starting on 2014 July 3.03 to 3.12 UT and July 4.22 to 4.38 UT, corresponding to <12 minutes and 1.19 days post-burst. No radio counterpart was detected during our first observation with a 3-sigma upper limit of 0.18 mJy. However, the radio counterpart (GCN 16515 and 16516) was detected during our second observation with a preliminary flux of 0.25 +/- 0.05 mJy. Further AMI monitoring is planned. We thank the AMI staff for scheduling these observations.