[vsnet-grb-info 19266] GRB 170325A: 15 GHz upper limits from AMI

[GCN Circulars]

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  <kunal.mooley at physics.ox.ac.uk>

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/.