GRB Properties
Parameters calculated by MPE
| Property | Value | Error (1 σ statistical) |
|---|---|---|
| Trigger Number | 608375325 | |
| Trigger Time | April 12, 2020, 09:08:40 | |
| Data Timestamp | April 12, 2020, 10:33:44 | |
| Localization Timestamp | April 12, 2020, 11:14:14 | |
| Balrog Ra [deg] | 270.1 | 1.1 |
| Balrog Dec [deg] | 64.7 | 0.2 |
| Error radius 1 σ [deg] | 0.5 | |
| Error radius 2 σ [deg] | 0.6 | |
| Estimated systematic error [deg] | 1 | |
| Fitted Model | band_function | |
| Spectral Parameter K [photons/cm^2/keV*s] | 0.17 | 0.0021 |
| Spectral Parameter Alpha | -2.8 | 0.099 |
| Spectral Parameter Beta | -0.83 | 0.0088 |
| Spectral Parameter XP | 3.8e+02 | 7.3 |
| Satellite Phi [deg] | -139.45 | |
| Satellite Theta [deg] | 30.76 |
Parameters from external Source
| Property | Value |
|---|---|
| Swift Ra [deg] | |
| Swift Dec [deg] | |
| Most likely | 91%: GRB |
| Second most likely | 5%: CygX-1 |
GRB Location Alert
GRB 200412B: BALROG localization (Fermi Trigger 608375325 / GRB 200412381)
J. Burgess, B. Biltzinger, F. Kunzweiler, F. Berlato & J. Greiner (all MPE Garching) report:
We note that the spectral fit from the automated pipeline appears off due to more high-energy emission than normal. We are re-running the pipeline manually to test this hypothesis. This position may be updated.
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
608375325 at 09:08:40 on 12 April 2020 were automatically fitted for spectrum
and sky location with the official BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 271.0+/-1.1 deg
Decl.(2000.0) = 64.4+/-0.3 deg
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB200412381/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB200412381/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB200412381/json
J. Burgess, B. Biltzinger, F. Kunzweiler, F. Berlato & J. Greiner (all MPE Garching) report:
We note that the spectral fit from the automated pipeline appears off due to more high-energy emission than normal. We are re-running the pipeline manually to test this hypothesis. This position may be updated.
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
608375325 at 09:08:40 on 12 April 2020 were automatically fitted for spectrum
and sky location with the official BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 271.0+/-1.1 deg
Decl.(2000.0) = 64.4+/-0.3 deg
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB200412381/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB200412381/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB200412381/json
