TITLE: GCN CIRCULAR NUMBER: 19813 SUBJECT: GRB 160804A: 15 GHz detections and upper limit from AMI DATE: 16/08/17 14:00:08 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) The AMI Large Array triggered on the Swift alert for GRB 160804A (Marshall et al., GCN 19761) as part of the 4pisky program, and subsequent follow up observations were obtained up to 12 days post-burst. Our observations at 15 GHz on 2016 Aug 04.85, Aug 05.75, Aug 07.75, Aug 11.75, and Aug 16.67 (UT) reveal a transient radio source at the XRT location (Osborne et al., GCN 19762), with flux densities of <141 uJy (3sigma), 189+/-46 uJy, 583+/-40 uJy, 292+/-34 uJy, and 168+/-38 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/.