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, 07:47:55
Localization Timestamp March 11, 2025, 11:01:00
Balrog Ra [deg] 210.7 0.4
Balrog Dec [deg] -7.9 1.0
Error radius 1 σ [deg] 1.1
Error radius 2 σ [deg] 2.5
Estimated systematic error [deg] 1
Fitted Model band_function
Spectral Parameter K [photons/cm^2/keV*s] 0.082 0.011
Spectral Parameter Alpha -0.8 0.072
Spectral Parameter Beta -2.3 0.07
Spectral Parameter XP 82 4.4
Satellite Phi [deg] -149.98
Satellite Theta [deg] 14.86

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/250311_110102125693_GRB250309318_lightcurve_tte_detector_b0_plot_v00.png
Lightcurve detector b0
data/GRB250309318/plots/250311_110101899180_GRB250309318_lightcurve_tte_detector_b1_plot_v00.png
Lightcurve detector b1
data/GRB250309318/plots/250311_110103308693_GRB250309318_lightcurve_tte_detector_n0_plot_v00.png
Lightcurve detector n0
data/GRB250309318/plots/250311_110103285715_GRB250309318_lightcurve_tte_detector_n1_plot_v00.png
Lightcurve detector n1
data/GRB250309318/plots/250311_110103108953_GRB250309318_lightcurve_tte_detector_n2_plot_v00.png
Lightcurve detector n2
data/GRB250309318/plots/250311_110103087404_GRB250309318_lightcurve_tte_detector_n3_plot_v00.png
Lightcurve detector n3
data/GRB250309318/plots/250311_110103051394_GRB250309318_lightcurve_tte_detector_n4_plot_v00.png
Lightcurve detector n4
data/GRB250309318/plots/250311_110103025941_GRB250309318_lightcurve_tte_detector_n5_plot_v00.png
Lightcurve detector n5
data/GRB250309318/plots/250311_110102823503_GRB250309318_lightcurve_tte_detector_n6_plot_v00.png
Lightcurve detector n6
data/GRB250309318/plots/250311_110102775898_GRB250309318_lightcurve_tte_detector_n7_plot_v00.png
Lightcurve detector n7
data/GRB250309318/plots/250311_110102775257_GRB250309318_lightcurve_tte_detector_n8_plot_v00.png
Lightcurve detector n8
data/GRB250309318/plots/250311_110102610230_GRB250309318_lightcurve_tte_detector_n9_plot_v00.png
Lightcurve detector n9
data/GRB250309318/plots/250311_110102515425_GRB250309318_lightcurve_tte_detector_na_plot_v00.png
Lightcurve detector na
data/GRB250309318/plots/250311_110102353754_GRB250309318_lightcurve_tte_detector_nb_plot_v00.png
Lightcurve detector nb