TITLE: GCN CIRCULAR NUMBER: 20958 SUBJECT: GRB 170325A: 15 GHz upper limits from AMI DATE: 17/03/31 15:12:54 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) We followed up the short GRB 170325A, detected in the Swift/BAT ground-based analysis (Palmer et al., GCN 20938), with the AMI Large Array as part of the 4pisky program. We note that this GRB was also detected by Fermi/LAT (Bissaldi et al., GCN 20940). Our observations at 15 GHz on 2016 Mar 27.01, Mar 27.84 and Mar 29.83 (UT; 1.7d, 2.5d and 4.5d post-burst respectively) do not reveal any transient source in the BAT error circle (Palmer et al., GCN 20938), which allows us to place 3sigma upper limits of 113 uJy, 85 uJy and 117 uJy respectively on the radio afterglow of the GRB. 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/.