Location of GRB210108424

GRB Properties

Parameters calculated by MPE

Property	Value	Error (1 σ statistical)
Trigger Number	631793415
Trigger Time	Jan. 08, 2021, 10:10:10
Data Timestamp	Jan. 08, 2021, 12:03:48
Localization Timestamp	Jan. 08, 2021, 12:33:48
Balrog Ra [deg]	307.8	4.1
Balrog Dec [deg]	-27.0	2.6
Error radius 1 σ [deg]	4.3
Error radius 2 σ [deg]	6.6
Estimated systematic error [deg]	1
Fitted Model	cutoff_powerlaw
Spectral Parameter K [photons/cm^2/keV*s]	7.4	2.8
Spectral Parameter Index	-1.7	0.13
Spectral Parameter XC [keV]	2e+03	2e+03
Satellite Phi [deg]	3.20
Satellite Theta [deg]	21.87

Parameters from external Source

Property	Value
Swift Ra [deg]
Swift Dec [deg]
Most likely	GRB 79.0%
Second most likely	SOLAR_FLARE 13.0%

GRB Location Alert

GRB 210108A: BALROG localization (Fermi Trigger 631793415 / GRB 210108424)

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

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
631793415 at 10:10:10 on 08 Jan. 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) = 306.9+/-4.3 deg
Decl.(2000.0) = -27.6+/-2.5 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210108424/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210108424/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210108424/json