Location of GRB200228291

GRB Properties

Parameters calculated by MPE

Property	Value	Error (1 σ statistical)
Trigger Number	604565918
Trigger Time	Feb. 28, 2020, 06:58:33
Data Timestamp	Feb. 28, 2020, 08:45:43
Localization Timestamp	Feb. 28, 2020, 14:24:49
Balrog Ra [deg]	332.3	1.0
Balrog Dec [deg]	-41.4	1.0
Error radius 1 σ [deg]	1.3
Error radius 2 σ [deg]	2.2
Estimated systematic error [deg]	1
Fitted Model	band_function
Spectral Parameter K [photons/cm^2/keV*s]	0.18	0.016
Spectral Parameter Alpha	-2.2	0.057
Spectral Parameter Beta	-0.25	0.056
Spectral Parameter XP	1.2e+02	4.3
Satellite Phi [deg]	18.16
Satellite Theta [deg]	53.16

Parameters from external Source

Property	Value
Swift Ra [deg]
Swift Dec [deg]
Most likely	97%: GRB
Second most likely	2%: GenericTransient

Download healpix file Download healpix file (with sys error)

GRB Location Alert

GRB 200228A: BALROG localization (Fermi Trigger 604565918 / GRB 200228291)

F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
604565918 at 06:58:33 on 28 Feb. 2020 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 (1 sigma statistical errors) is:
RA(2000.0) = 332.9+/-0.9 deg
Decl.(2000.0) = -39.9+/-1.0 deg
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB200228291/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB200228291/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB200228291/json