TITLE:   GCN CIRCULAR
NUMBER:  42907
SUBJECT: GRB 251130B: Fermi GBM Final Localization Correction
DATE:    25/11/30 18:45:22 GMT
FROM:    rhamburg@usra.edu

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"