[vsnet-grb-info 23490] GRB 190829A: NOEMA detection of the mm afterglow

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25589
SUBJECT: GRB 190829A: NOEMA detection of the mm afterglow
DATE:    19/08/31 15:01:35 GMT
FROM:    Alexander Kann at IAA-CSIC  <kann at iaa.es>

A. de Ugarte Postigo (HETH/IAA-CSIC and DARK/NBI), M. Bremer (IRAM), D. 
A. Kann (HETH/IAA-CSIC), S. Schulze (Weizmann), C. C. Thoene, M. Blazek, 
K. Bensch, J. F. Agui (all HETH/IAA-CSIC), L. Izzo (DARK/NBI), D. A. 
Perley (LJMU), S. Martin (ALMA), I. de Gregorio-Monsalvo (ESO), M. 
Michalowski (AOI-AMU), D. B. Malesani (DARK/NBI, DAWN/NBI) R. 
Sanchez-Ramirez (INAF-IAPS) report:

We observed the afterglow of GRB 190829A (Fermi GBM team, GCN #25551; 
Dichiara et al., GCN #25552), at a redshift of z = 0.0785 (Valeev et al. 
GCN #25565) with NOEMA at 90 GHz. Observations started at 01:26 UT on 31 
August, 29.48 hrs after the GRB. The afterglow is well detected and had 
a flux density of 6.3 mJy at 90 GHz.

We derive the following refined coordinates for the afterglow:

RA. (J2000): 02:58:10.510
Dec (J2000): -08:57:28.44

with an error of +/- 0".1.