TITLE:   GCN CIRCULAR
NUMBER:  29733
SUBJECT: GRB 210328A: BALROG localization (Fermi Trigger  / GRB 210328865)
DATE:    21/03/28 21:17:20 GMT
FROM:    Jochen Greiner at MPE,Garching  <jcg@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
 at 20:45:16 on 28 March 2021 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) = 205.9+/-1.3 deg
Decl.(2000.0) = -11.4+/-1.5 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210328865/?data_version=h00

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/media/data/GRB210328865/data_files/210328_211506727701_GRB210328865_healpix_trigdat_h00.fits

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210328865/json