[vsnet-grb-info 26980] GRB 201218A: BALROG localization (Fermi Trigger 629957660 / GRB 201218177)

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29083
SUBJECT: GRB 201218A: BALROG localization (Fermi Trigger 629957660 / GRB 201218177)
DATE:    20/12/18 04:43:49 GMT
FROM:    Jochen Greiner at MPE,Garching  <jcg at mpe.mpg.de>

B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
629957660 at 04:14:15 on 18 Dec. 2020 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).

The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 287.38+/-0.29 deg
Decl.(2000.0) = 26.80+/-0.30 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB201218177/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB201218177/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB201218177/json