This is the Analysis page for GRB250309318: GRB250309318

Version History of Data Files: v01 v00 tte_v00 h1_no-na h01

GRB Properties

Parameters calculated by MPE

Property Value Error (1 σ statistical)
Trigger Number
Trigger Time March 09, 2025, 07:38:30
Data Timestamp March 09, 2025, 09:42:36
Localization Timestamp March 09, 2025, 12:04:59
Balrog Ra [deg] 210.1 0.5
Balrog Dec [deg] -7.6 0.9
Error radius 1 σ [deg] 1.5
Error radius 2 σ [deg] 1.6
Estimated systematic error [deg] 1
Fitted Model cutoff_powerlaw
Spectral Parameter K [photons/cm^2/keV*s] 33 3.3
Spectral Parameter Index -1.6 0.034
Spectral Parameter XC [keV] 3e+02 5e+01
Satellite Phi [deg] -150.13
Satellite Theta [deg] 15.53

Parameters from external Source

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

GRB Location Alert

To circulars@gcn.nasa.gov

GRB 250309B: BALROG localization (Fermi Trigger 763198715 / GRB 250309318)

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

The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
763198715 at 07:38:30 on 09 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) = 210.5 deg
Decl.(2000.0) = -7.6 deg
The 1 sigma statistical error radius is 1.3 deg.
We estimate an additional systematic error of 1 deg.

Further details are available at:
https://grb.mpe.mpg.de/grb/GRB250309318/

The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB250309318/healpix

The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB250309318/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

data/GRB250309318/plots/250309_120549949175_GRB250309318_lightcurve_trigdat_detector_b0_plot_h01.png
Lightcurve detector b0
data/GRB250309318/plots/250309_120550025461_GRB250309318_lightcurve_trigdat_detector_b1_plot_h01.png
Lightcurve detector b1
data/GRB250309318/plots/250309_120548865185_GRB250309318_lightcurve_trigdat_detector_n0_plot_h01.png
Lightcurve detector n0
data/GRB250309318/plots/250309_120548956513_GRB250309318_lightcurve_trigdat_detector_n1_plot_h01.png
Lightcurve detector n1
data/GRB250309318/plots/250309_120549052906_GRB250309318_lightcurve_trigdat_detector_n2_plot_h01.png
Lightcurve detector n2
data/GRB250309318/plots/250309_120549154038_GRB250309318_lightcurve_trigdat_detector_n3_plot_h01.png
Lightcurve detector n3
data/GRB250309318/plots/250309_120549247831_GRB250309318_lightcurve_trigdat_detector_n4_plot_h01.png
Lightcurve detector n4
data/GRB250309318/plots/250309_120549341778_GRB250309318_lightcurve_trigdat_detector_n5_plot_h01.png
Lightcurve detector n5
data/GRB250309318/plots/250309_120549437182_GRB250309318_lightcurve_trigdat_detector_n6_plot_h01.png
Lightcurve detector n6
data/GRB250309318/plots/250309_120549530314_GRB250309318_lightcurve_trigdat_detector_n7_plot_h01.png
Lightcurve detector n7
data/GRB250309318/plots/250309_120549611234_GRB250309318_lightcurve_trigdat_detector_n8_plot_h01.png
Lightcurve detector n8
data/GRB250309318/plots/250309_120549693876_GRB250309318_lightcurve_trigdat_detector_n9_plot_h01.png
Lightcurve detector n9
data/GRB250309318/plots/250309_120549774893_GRB250309318_lightcurve_trigdat_detector_na_plot_h01.png
Lightcurve detector na
data/GRB250309318/plots/250309_120549860935_GRB250309318_lightcurve_trigdat_detector_nb_plot_h01.png
Lightcurve detector nb