GRB Properties
Parameters calculated by MPE
Property | Value | Error (1 σ statistical) |
---|---|---|
Trigger Number | ||
Trigger Time | March 09, 2025, 07:38:30 | |
Data Timestamp | March 09, 2025, 09:42:36 | |
Localization Timestamp | March 09, 2025, 13:45:49 | |
Balrog Ra [deg] | 210.2 | 0.5 |
Balrog Dec [deg] | -7.9 | 0.6 |
Error radius 1 σ [deg] | 1.1 | |
Error radius 2 σ [deg] | 2.0 | |
Estimated systematic error [deg] | 1 | |
Fitted Model | cutoff_powerlaw | |
Spectral Parameter K [photons/cm^2/keV*s] | 33 | 4.4 |
Spectral Parameter Index | -1.6 | 0.04 |
Spectral Parameter XC [keV] | 3e+02 | 6e+01 |
Satellite Phi [deg] | -150.26 | |
Satellite Theta [deg] | 15.26 |
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 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