TITLE: GCN CIRCULAR NUMBER: 19534 SUBJECT: GRB 160521A: 15 GHz detections and upper limit from AMI DATE: 16/06/14 16:24:06 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. H. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester) We observed the INTEGRAL/IBIS GRB 160521A (Mereghetti et al., GCN 19442) with the AMI Large Array at 15 GHz on 2016 May 24.62, May 27.52, and Jun 03.61 (UT) as part of the 4pisky program. We detect a transient radio source (RA=08:38:51.3 +/-6 arcsec, Dec=+46:54:21 +/-24 arcsec) within the INTEGRAL error circle at 266+/-36 uJy and 133+/-29 uJy in the first two epochs, and obtain a 3sigma upper limit of 93 uJy in the third epoch. 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/.