This is the Analysis page for GRB211021460: GRB211021460

Version History of Data Files: v01

GRB Properties

Parameters calculated by MPE

Property Value Error (1 σ statistical)
Trigger Number 656506979
Trigger Time Oct. 21, 2021, 11:02:54
Data Timestamp Oct. 21, 2021, 11:52:04
Localization Timestamp Oct. 21, 2021, 11:58:34
Balrog Ra [deg] 29.4 3.2
Balrog Dec [deg] 27.2 2.1
Error radius 1 σ [deg] 3.4
Error radius 2 σ [deg] 5.2
Estimated systematic error [deg] 1
Fitted Model cutoff_powerlaw
Spectral Parameter K [photons/cm^2/keV*s] 6.1 2.7
Spectral Parameter Index -1.2 0.16
Spectral Parameter XC [keV] 1e+02 3e+01
Satellite Phi [deg] 163.47
Satellite Theta [deg] -8.77

Parameters from external Source

Property Value
Swift Ra [deg]
Swift Dec [deg]
Most likely GRB 64.0%
Second most likely DISTANT_PARTICLES 34.0%

GRB Location Alert

GRB 211021A: BALROG localization (Fermi Trigger 656506979 / GRB 211021460)

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
656506979 at 11:02:54 on 21 Oct. 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) = 29.4+/-3.2 deg
Decl.(2000.0) = 27.2+/-2.1 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:

The Healpix map can be downloaded from:

The location parameters are available as JSON at:

GRB Location

J2000 Coordinate Frame

All Corner Plot

J2000 Coordinate Frame

Moll Location Plot

J2000 Coordinate Frame


Spectrum Residuals Plot

3D - GRB Location Plot

Satellite Coordiante Frame

Light Curves

Lightcurve detector b0
Lightcurve detector b1
Lightcurve detector n0
Lightcurve detector n1
Lightcurve detector n2
Lightcurve detector n3
Lightcurve detector n4
Lightcurve detector n5
Lightcurve detector n6
Lightcurve detector n7
Lightcurve detector n8
Lightcurve detector n9
Lightcurve detector na
Lightcurve detector nb