GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | ||
| Trigger Time | Dec. 22, 2025, 17:05:51 | |
| Data Timestamp | Dec. 22, 2025, 17:15:21 | |
| Localization Timestamp | Dec. 22, 2025, 18:21:09 | |
| Balrog Ra [deg] | 76.6 | 1.3 |
| Balrog Dec [deg] | -7.7 | 1.6 |
| Error radius 1 σ [deg] | 2.5 | |
| Error radius 2 σ [deg] | 3.4 | |
| Estimated systematic error [deg] | 1 | |
| Fitted Model | cutoff_powerlaw | |
| Spectral Parameter K [photons/cm^2/keV*s] | 7.6 | 2 |
| Spectral Parameter Index | -1.4 | 0.074 |
| Spectral Parameter XC [keV] | 4e+02 | 2e+02 |
| Satellite Phi [deg] | 158.58 | |
| Satellite Theta [deg] | 6.27 |
Parameters from external Source
| Property | Value |
|---|---|
| Swift Ra [deg] | |
| Swift Dec [deg] | |
| Most likely | None None% |
| Second most likely | None None% |
GRB Location Alert
To circulars@gcn.nasa.gov
GRB 251222A: BALROG localization (Fermi Trigger / GRB 251222712)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
at 17:05:51 on 22 Dec. 2025 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 is:
RA(2000.0) = 76.6 deg
Decl.(2000.0) = -7.7 deg
The 1 sigma statistical error radius is 2.5 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB251222712/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB251222712/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB251222712/json
GRB 251222A: BALROG localization (Fermi Trigger / GRB 251222712)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
at 17:05:51 on 22 Dec. 2025 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 is:
RA(2000.0) = 76.6 deg
Decl.(2000.0) = -7.7 deg
The 1 sigma statistical error radius is 2.5 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB251222712/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB251222712/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB251222712/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
