GCN Circular 42907
Subject
GRB 251130B: Fermi GBM Final Localization Correction
Event
Date
2025-11-30T18:45:22Z (3 days ago)
Edited On
2025-12-02T18:18:47Z (a day ago)
From
rhamburg@usra.edu
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of rhamburg@usra.edu
Via
Web form
The Fermi GBM team reports the detection of a likely LONG GRB
"At 15:33:18.11 UT on 30 November 2025, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 251130B (trigger 786209603/251130648).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 78.82, Dec = -43.31 (J2000 degrees, equivalent to J2000 5h 15m, –43d 18'), with a statistical uncertainty of 1.74 degrees.
The angle from the Fermi LAT boresight is 94 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251130648/quicklook/glg_skymap_all_bn251130648.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251130648/quicklook/glg_healpix_all_bn251130648.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251130648/quicklook/glg_lc_medres34_bn251130648.gif"