GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | 745958167 | |
| Trigger Time | Aug. 21, 2024, 18:36:02 | |
| Data Timestamp | Aug. 21, 2024, 19:58:50 | |
| Localization Timestamp | Aug. 21, 2024, 20:24:31 | |
| Balrog Ra [deg] | 352.8 | 1.4 |
| Balrog Dec [deg] | -11.8 | 1.7 |
| Error radius 1 σ [deg] | 2.7 | |
| Error radius 2 σ [deg] | 4.2 | |
| Estimated systematic error [deg] | 1 | |
| Fitted Model | cutoff_powerlaw | |
| Spectral Parameter K [photons/cm^2/keV*s] | 5 | 1.3 |
| Spectral Parameter Index | -1.1 | 0.066 |
| Spectral Parameter XC [keV] | 6e+02 | 2e+02 |
| Satellite Phi [deg] | 168.44 | |
| Satellite Theta [deg] | -3.81 |
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 240821A: BALROG localization (Fermi Trigger 745958167 / GRB 240821775)
T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
745958167 at 18:36:02 on 21 Aug. 2024 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) = 352.9 deg
Decl.(2000.0) = -11.2 deg
The 1 sigma statistical error radius is 3.0 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB240821775/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB240821775/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB240821775/json
GRB 240821A: BALROG localization (Fermi Trigger 745958167 / GRB 240821775)
T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
745958167 at 18:36:02 on 21 Aug. 2024 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) = 352.9 deg
Decl.(2000.0) = -11.2 deg
The 1 sigma statistical error radius is 3.0 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB240821775/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB240821775/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB240821775/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
