GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | 771432801 | |
| Trigger Time | June 12, 2025, 14:53:16 | |
| Data Timestamp | June 12, 2025, 15:00:54 | |
| Localization Timestamp | June 12, 2025, 15:16:18 | |
| Balrog Ra [deg] | 118.9 | 0.6 |
| Balrog Dec [deg] | 18.8 | 0.6 |
| Error radius 1 σ [deg] | 1.1 | |
| Error radius 2 σ [deg] | 1.8 | |
| Estimated systematic error [deg] | 1 | |
| Fitted Model | cutoff_powerlaw | |
| Spectral Parameter K [photons/cm^2/keV*s] | 4.6 | 0.33 |
| Spectral Parameter Index | -0.91 | 0.015 |
| Spectral Parameter XC [keV] | 1e+03 | 6e+01 |
| Satellite Phi [deg] | -23.18 | |
| Satellite Theta [deg] | -12.07 |
Parameters from external Source
| Property | Value |
|---|---|
| Swift Ra [deg] | |
| Swift Dec [deg] | |
| Most likely | GRB 95.0% |
| Second most likely | GENERIC_TRANSIENT 4.0% |
GRB Location Alert
To circulars@gcn.nasa.gov
GRB 250612C: BALROG localization (Fermi Trigger 771432801 / GRB 250612620)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
771432801 at 14:53:16 on 12 June 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) = 118.9 deg
Decl.(2000.0) = 18.8 deg
The 1 sigma statistical error radius is 1.1 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250612620/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250612620/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250612620/json
GRB 250612C: BALROG localization (Fermi Trigger 771432801 / GRB 250612620)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
771432801 at 14:53:16 on 12 June 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) = 118.9 deg
Decl.(2000.0) = 18.8 deg
The 1 sigma statistical error radius is 1.1 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250612620/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250612620/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250612620/json
GRB Location
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J2000 Coordinate Frame
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J2000 Coordinate Frame
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3D - GRB Location Plot
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