[vsnet-grb-info 18862] GRB 161219B: VLA Detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20313
SUBJECT: GRB 161219B: VLA Detection
DATE:    16/12/21 02:13:57 GMT
FROM:    Kate Alexander at Harvard  <kalexander at cfa.harvard.edu>

K. D. Alexander (Harvard), T. Laskar (NRAO / UC Berkeley), and E. Berger
(Harvard) report on behalf of a larger collaboration:

We observed the Swift GRB 161219B (D’Ai et al. GCN 20296) at multiple
frequencies with the Karl G. Jansky Very Large Array (VLA) beginning 2016
December 20.26 UT (11.4 hours after the burst). At a mean frequency of
14.75 GHz, we detect a radio source with a preliminary flux density of ~0.9
mJy at

RA (J2000) = 06:06:51.428 +/- 0.001
Dec (J2000) = -26:47:29.52 +/- 0.01

consistent with the position of the optical afterglow and the refined
Swift/XRT position (Beardmore et al. GCN 20297). Follow-up observations are
planned.

We thank the VLA staff for rapidly executing these observations.