GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | 644155206 | |
| Trigger Time | May 31, 2021, 12:00:01 | |
| Data Timestamp | May 31, 2021, 12:10:22 | |
| Localization Timestamp | May 31, 2021, 12:22:41 | |
| Balrog Ra [deg] | 140.9 | 0.5 |
| Balrog Dec [deg] | 6.1 | 0.7 |
| Error radius 1 σ [deg] | 2.0 | |
| Error radius 2 σ [deg] | 3.1 | |
| Estimated systematic error [deg] | 2 | |
| Fitted Model | cutoff_powerlaw | |
| Spectral Parameter K [photons/cm^2/keV*s] | 24 | 1.3 |
| Spectral Parameter Index | -1.2 | 0.016 |
| Spectral Parameter XC [keV] | 5e+02 | 3e+01 |
| Satellite Phi [deg] | -66.60 | |
| Satellite Theta [deg] | -1.30 |
Parameters from external Source
| Property | Value |
|---|---|
| Swift Ra [deg] | |
| Swift Dec [deg] | |
| Most likely | GRB 97.0% |
| Second most likely | GENERIC_TRANSIENT 2.0% |
GRB Location Alert
GRB 210531A: BALROG localization (Fermi Trigger 644155206 / GRB 210531500)
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
644155206 at 12:00:01 on 31 May 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) = 140.9+/-0.5 deg
Decl.(2000.0) = 6.1+/-0.7 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210531500/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210531500/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210531500/json
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
644155206 at 12:00:01 on 31 May 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) = 140.9+/-0.5 deg
Decl.(2000.0) = 6.1+/-0.7 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210531500/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210531500/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210531500/json
GRB Location
J2000 Coordinate Frame
All Corner Plot
J2000 Coordinate Frame
Moll Location Plot
J2000 Coordinate Frame
Satellite
Spectrum Residuals Plot
3D - GRB Location Plot
Satellite Coordiante Frame
Light Curves
