TITLE: GCN CIRCULAR NUMBER: 20787 SUBJECT: GRB 170206B: 15 GHz upper limits from AMI DATE: 17/03/01 16:43:13 GMT FROM: Kunal Mooley at Oxford U K. P. Mooley (Hintze Fellow, Oxford), T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), 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 observed the Swift GRB 170206B (Lien et al., GCN 20618) as part of the 4pisky program; follow up observations were obtained up to 10 days post-burst. Our observations at 15 GHz on 2016 Feb 08.37, Feb 09.38, Feb 14.43 and Feb 15.46 (UT) do not reveal any radio source at the XRT location (Evans et al., GCN 20619), with 3sigma upper limits of 123 uJy, 108 uJy, 108 uJy and 108 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/.