GCN Circular 21947
Subject
GRB 170822A: 15 GHz upper limits from AMI
Date
2017-10-01T20:07:24Z (7 years ago)
From
Kunal Mooley at Oxford U <kunal.mooley@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)
The AMI Large Array robotically triggered on the Swift alert for GRB
170822A (Melandri et al., GCN 21640) as part of the 4pisky program, and
subsequent follow up observations were obtained up to 30 days
post-burst. Our observations at 15 GHz on 2017 Aug 22.42, Aug 25.34, Aug
26.34, Aug 30.37, Sep 03.28 and Sep 20.26 (UT) do not reveal any radio
source at the XRT location (Beardmore et al., GCN 21643), with 3sigma
upper limits of 165 uJy, 132 uJy, 138 uJy, 210 uJy, 210 uJy and 138 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/.