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, 21:17:20 | |
| Balrog Ra [deg] | 227.9 | 1.1 |
| Balrog Dec [deg] | -27.3 | 0.7 |
| Error radius 1 σ [deg] | 1.7 | |
| Error radius 2 σ [deg] | 2.7 | |
| Estimated systematic error [deg] | 1 | |
| Fitted Model | band_function | |
| Spectral Parameter K [photons/cm^2/keV*s] | 0.074 | 0.036 |
| Spectral Parameter Alpha | -0.94 | 0.18 |
| Spectral Parameter Beta | -2.8 | 0.16 |
| Spectral Parameter XP | 50 | 3.7 |
| Satellite Phi [deg] | 154.42 | |
| Satellite Theta [deg] | 22.07 |
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
