GCN Circular 22187
Subject
GRB 171205A: NOEMA detection of a bright mm afterglow
Date
2017-12-06T10:26:44Z (6 years ago)
From
Antonio de Ugarte Postigo at IAA-CSIC <deugarte@iaa.es>
A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI),
S. Schulze (Weizmann), M. Bremer, M. Krips (IRAM),
C.C. Thoene, L. Izzo, D.A. Kann, Z. Cano, K. Bensch
(HETH/IAA-CSIC), S. Martin Ruiz, I. de Gregorio (ALMA),
S. Kim (PUC), R. S��nchez-Ramirez (INAF-IAPS),
D. Malesani (DARK/NBI) report:
We observed the afterglow of GRB 171205A with
NOEMA at 150GHz and 90GHz starting at 3:30 UT on the
6th of December (20.2 hrs after the GRB onset). We
detect a bright afterglow in 150GHz with a preliminary
flux density estimate of 35-40 mJy. The coordinates
of the detected source are (J2000 +/- 0.05"):
R.A.: 11:09:39.52
Dec.: -12:35:18.34
We note that if the flux density is confirmed, it would be
the second brightest GRB ever detected in mm/submm
wavelengths, after GRB 030329 (for a review on
mm/submm data of GRBs see de Ugarte Postigo et al.
2012).
Further follow-up observations are encouraged.