GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | 763198715 | |
| Trigger Time | March 09, 2025, 07:38:30 | |
| Data Timestamp | March 09, 2025, 09:42:36 | |
| Localization Timestamp | March 09, 2025, 10:05:32 | |
| Balrog Ra [deg] | 210.5 | 0.3 |
| Balrog Dec [deg] | -7.6 | 0.8 |
| Error radius 1 σ [deg] | 1.3 | |
| Error radius 2 σ [deg] | 1.5 | |
| Estimated systematic error [deg] | 1 | |
| Fitted Model | cutoff_powerlaw | |
| Spectral Parameter K [photons/cm^2/keV*s] | 33 | 4.1 |
| Spectral Parameter Index | -1.6 | 0.036 |
| Spectral Parameter XC [keV] | 3e+02 | 5e+01 |
| Satellite Phi [deg] | -149.87 | |
| Satellite Theta [deg] | 15.23 |
Parameters from external Source
| Property | Value |
|---|---|
| Swift Ra [deg] | |
| Swift Dec [deg] | |
| Most likely | GRB 98.0% |
| Second most likely | GENERIC_SGR 1.0% |
GRB Location Alert
To circulars@gcn.nasa.gov
GRB 250309B: BALROG localization (Fermi Trigger 763198715 / GRB 250309318)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
763198715 at 07:38:30 on 09 March 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) = 210.5 deg
Decl.(2000.0) = -7.6 deg
The 1 sigma statistical error radius is 1.3 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250309318/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250309318/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250309318/json
GRB 250309B: BALROG localization (Fermi Trigger 763198715 / GRB 250309318)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
763198715 at 07:38:30 on 09 March 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) = 210.5 deg
Decl.(2000.0) = -7.6 deg
The 1 sigma statistical error radius is 1.3 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250309318/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250309318/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250309318/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
