TITLE: GCN CIRCULAR NUMBER: 19563 SUBJECT: GRB 160521B: 15 GHz upper limits from AMI DATE: 16/06/24 12:49:41 GMT FROM: Kunal Mooley at Oxford U K. P. Mooley, T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), C. Rumsey, D. Titterington, S. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester) We observed the Fermi/LAT GRB 160521B (Veres et al., GCN 19434) with the AMI Large Array at 15 GHz on 2016 May 24.75, May 27.65, and Jun 03.73 (UT) as part of the 4pisky program. We do not detect any source at the XRT location (Page et al., GCN 19448), with 3sigma upper limits of 108 uJy, 108 uJy, and 117 uJy respectively. We thank the AMI staff for scheduling these observations. The AMI-GRB database is a log of all GRB follow up observations with the AMI, and is available at http://4pisky.org/ami-grb/.