GCN Circular 18548
Subject
GRB 151027B: ATCA radio detection
Event
Date
2015-11-01T07:01:04Z (10 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
J. Greiner (MPE), M. Wieringa (CSIRO), P. Wiseman (MPE) report for a
larger consortium:
We observed the field of GRB 151027B (Swift trigger 661869; Ukwatta et
al., GCN 18499) simultaneously at 5.5 and 9 GHz with the Australia
Telescope Compact Array (ATCA), beginning at October 30.54 UT for 3.3 hrs.
At a mean frequency of 9 GHz (with 2 GHz bandwidth) we detect a source
at ~67+/-10 microJy at the position of the optical afterglow (Malesani
et al., GCN 18501; Wiseman et al., GCN 18507). At the redshift of z=4.063
(Xu et al., GCN 18506) this is among the most luminous GRB radio afterglows.
We are grateful to P. Edwards for scheduling this observation.