GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | 771424081 | |
| Trigger Time | June 12, 2025, 12:27:56 | |
| Data Timestamp | June 12, 2025, 12:37:19 | |
| Localization Timestamp | June 12, 2025, 12:50:52 | |
| Balrog Ra [deg] | 226.1 | 1.8 |
| Balrog Dec [deg] | -28.9 | 0.9 |
| Error radius 1 σ [deg] | 2.4 | |
| Error radius 2 σ [deg] | 4.0 | |
| Estimated systematic error [deg] | 1 | |
| Fitted Model | cutoff_powerlaw | |
| Spectral Parameter K [photons/cm^2/keV*s] | 42 | 9.8 |
| Spectral Parameter Index | -1.7 | 0.08 |
| Spectral Parameter XC [keV] | 1e+02 | 2e+01 |
| Satellite Phi [deg] | 152.04 | |
| Satellite Theta [deg] | 21.53 |
Parameters from external Source
| Property | Value |
|---|---|
| Swift Ra [deg] | |
| Swift Dec [deg] | |
| Most likely | GRB 66.0% |
| Second most likely | GENERIC_SGR 28.0% |
GRB Location Alert
To circulars@gcn.nasa.gov
GRB 250612A: BALROG localization (Fermi Trigger 771424081 / GRB 250612519)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
771424081 at 12:27:56 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) = 226.1 deg
Decl.(2000.0) = -28.9 deg
The 1 sigma statistical error radius is 2.4 deg.
We estimate an additional systematic error of 1 deg.
This is consistent in time and position with the Einstein Probe detection of the X-ray transient EP 250612a (GCN 40700).
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250612519/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250612519/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250612519/json
GRB 250612A: BALROG localization (Fermi Trigger 771424081 / GRB 250612519)
T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
771424081 at 12:27:56 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) = 226.1 deg
Decl.(2000.0) = -28.9 deg
The 1 sigma statistical error radius is 2.4 deg.
We estimate an additional systematic error of 1 deg.
This is consistent in time and position with the Einstein Probe detection of the X-ray transient EP 250612a (GCN 40700).
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250612519/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250612519/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250612519/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
