[vsnet-grb-info 18877] GRB 161219B: Rapid ALMA Observations & Detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Dec 22 09:14:00 JST 2016
TITLE: GCN CIRCULAR
NUMBER: 20328
SUBJECT: GRB 161219B: Rapid ALMA Observations & Detection
DATE: 16/12/22 00:08:08 GMT
FROM: Tanmoy Laskar at UC Berkeley <tanmoylaskar at gmail.com>
T. Laskar (NRAO / UC Berkeley), K. D. Alexander (Harvard), and E. Berger
(Harvard) report on behalf of a larger collaboration:
We observed the Swift GRB 161219B (D’Ai et al. GCN 20296) at 3 mm with the
Atacama Large Millimeter/submillimeter Array (ALMA) beginning 2016 December
21.08 UT (1.30 days after the burst). At a mean frequency of 97 GHz, we
detect a radio source with a preliminary flux density of ~ 1 mJy at
RA (J2000) = 06:06:51.429 +/- 0.001
Dec (J2000) = -26:47:29.62 +/- 0.01
consistent with the position of the optical afterglow, the refined
Swift/XRT position (Beardmore et al. GCN 20297), and the radio afterglow
(Alexander et al. GCN 20313). Follow-up observations are planned.
We thank the JAO staff for rapidly executing these observations.
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