GCN Circular 16595
G. E. Anderson, R. P. Fender, T. D. Staley (University of Oxford), A. J. van der Horst (University of Amsterdam), A. Rowlinson (CASS) and C. Rumsey (MRAO) We observed the position of GRB 140709A (GCN 16546) at 15 GHz with the Arcminute Microkelvin Imager (AMI-LA) starting on 2014 July 11.93 to 12.10 UT, corresponding to 2.88 days post-burst. We have detected a possible radio counterpart consistent with the UVOT-enhanced XRT position (GCN 16548) with a preliminary flux of 0.35 +/- 0.06 mJy. However, this source is blended with the nearby NVSS source 201841+511349 lying at an angular distance of 27.5 arcseconds. The angular resolution of AMI is ~30 arcseconds. The flux was calculated by first subtracting the contribution from the NVSS source. Earlier AMI observations an 2014 July 9.05 to 9.14 UT and July 10.04 to 10.2, corresponding to <5 minutes and 1 day post-burst, did not detect a radio source at the position of the GRB with 3 sigma upper limits of 0.30 and 0.21 mJy, respectively. Further AMI monitoring is planned. We thank the AMI staff for scheduling these observations.