GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | 779934537 | |
| Trigger Time | Sept. 19, 2025, 00:28:52 | |
| Data Timestamp | Sept. 19, 2025, 01:54:44 | |
| Localization Timestamp | Sept. 19, 2025, 02:15:42 | |
| Balrog Ra [deg] | 300.5 | 0.2 |
| Balrog Dec [deg] | -49.1 | 0.2 |
| Error radius 1 σ [deg] | 0.3 | |
| Error radius 2 σ [deg] | 0.6 | |
| Estimated systematic error [deg] | 2 | |
| Fitted Model | cutoff_powerlaw | |
| Spectral Parameter K [photons/cm^2/keV*s] | 8.4 | 0.16 |
| Spectral Parameter Index | -0.8 | 0.0045 |
| Spectral Parameter XC [keV] | 6e+02 | 8 |
| Satellite Phi [deg] | -129.15 | |
| Satellite Theta [deg] | 31.81 |
Parameters from external Source
| Property | Value |
|---|---|
| Swift Ra [deg] | |
| Swift Dec [deg] | |
| Most likely | GRB 94.0% |
| Second most likely | GENERIC_TRANSIENT 4.0% |
GRB Location Alert
To circulars@gcn.nasa.gov
GRB 250919A: BALROG localization (Fermi Trigger 779934537 / GRB 250919020)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
779934537 at 00:28:52 on 19 Sept. 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) = 300.5 deg
Decl.(2000.0) = -49.1 deg
The 1 sigma statistical error radius is 0.3 deg.
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250919020/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250919020/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250919020/json
GRB 250919A: BALROG localization (Fermi Trigger 779934537 / GRB 250919020)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
779934537 at 00:28:52 on 19 Sept. 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) = 300.5 deg
Decl.(2000.0) = -49.1 deg
The 1 sigma statistical error radius is 0.3 deg.
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250919020/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250919020/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250919020/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
