TITLE: GCN CIRCULAR NUMBER: 20667 SUBJECT: GRB 170203A: 15 GHz upper limits from AMI DATE: 17/02/12 19:22:31 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 robotically triggered on the Swift alert for GRB 170203A (Racusin et al., GCN 20583) as part of the 4pisky program, and subsequent follow up observations were obtained up to 10 days post-burst. Our observations at 15 GHz on 2016 Feb 03.37, Feb 04.56, Feb 06.56 and Feb 10.55 (UT) do not reveal any radio source at the BAT location (Cummings et al., GCN 20597), with 3sigma upper limits of 183 uJy, 84 uJy, 75 uJy and 171 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/.