GCN Circular 21951
Subject
GRB 170921A: 15 GHz upper limits from AMI
Date
2017-10-01T20:13:58Z (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
170921A (D'Ai et al., GCN 21901) 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 2017 Sep 21.89, Sep 27.04 and
Sep 28.97 (UT) do not reveal any radio source at the XRT location
(Beardmore et al., GCN 21906), with 3sigma upper limits of 186 uJy, 117
uJy and 159 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/.