Location of GRB210101620

GRB Properties

Parameters calculated by MPE

Property	Value	Error (1 σ statistical)
Trigger Number	631205591
Trigger Time	Jan. 01, 2021, 14:53:06
Data Timestamp	Jan. 01, 2021, 16:12:11
Localization Timestamp	Jan. 01, 2021, 18:56:50
Balrog Ra [deg]	86.2	7.0
Balrog Dec [deg]	6.1	6.6
Error radius 1 σ [deg]	9.2
Error radius 2 σ [deg]	15.2
Estimated systematic error [deg]	1
Fitted Model	band_function
Spectral Parameter K [photons/cm^2/keV*s]	0.0015	0.00037
Spectral Parameter Alpha	-0.19	0.3
Spectral Parameter Beta	-1.6	0.032
Spectral Parameter XP	3e+03	1e+03
Satellite Phi [deg]	-175.10
Satellite Theta [deg]	2.94

Parameters from external Source

Property	Value
Swift Ra [deg]
Swift Dec [deg]
Most likely	GRB 95.0%
Second most likely	DISTANT_PARTICLES 2.0%

GRB Location Alert

GRB 210101A: BALROG localization (Fermi Trigger 631205591 / GRB 210101620)

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
631205591 at 14:53:06 on 01 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) = 149.6+/-3.8 deg
Decl.(2000.0) = 53.1+/-2.4 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210101620/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210101620/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210101620/json