Location of GRB250313607

GRB Properties

Parameters calculated by MPE

Property	Value	Error (1 σ statistical)
Trigger Number
Trigger Time	March 13, 2025, 14:34:33
Data Timestamp	March 13, 2025, 14:43:34
Localization Timestamp	March 13, 2025, 15:51:30
Balrog Ra [deg]	273.4	0.1
Balrog Dec [deg]	47.3	0.1
Error radius 1 σ [deg]	0.1
Error radius 2 σ [deg]	1.0
Estimated systematic error [deg]	2
Fitted Model	cutoff_powerlaw
Spectral Parameter K [photons/cm^2/keV*s]	5.8	0.51
Spectral Parameter Index	-0.87	0.025
Spectral Parameter XC [keV]	2e+02	1e+01
Satellite Phi [deg]	-93.27
Satellite Theta [deg]	82.39

Parameters from external Source

Property	Value
Swift Ra [deg]
Swift Dec [deg]
Most likely	None None%
Second most likely	None None%

Download healpix file Download healpix file (with sys error)

GRB Location Alert

To circulars@gcn.nasa.gov

GRB 250313A???: BALROG localization (Fermi Trigger / GRB 250313607)

T. Preis (University of Innsbruck) & J. Greiner (MPE Garching) report:

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
at 14:34:33 on 13 March 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) = 274.6 deg
Decl.(2000.0) = 45.3 deg
The 1 sigma statistical error radius is 0.1 deg.
We estimate an additional systematic error of 2 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250313607/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250313607/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250313607/json