TITLE:   GCN CIRCULAR
NUMBER:  42687
SUBJECT: GRB 251114B: Fermi GBM Final Real-time Localization
DATE:    25/11/14 20:49:04 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

At 20:38:30 UT on 14 Nov 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251114B (trigger 784845515.202048 / 251114860).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 160.1, Dec = -85.2 (J2000 degrees, equivalent to J2000 10h 40m, -85d 12'), with a statistical uncertainty of 3.5 degrees.

The angle from the Fermi LAT boresight is 57.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251114860/quicklook/glg_skymap_all_bn251114860.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/bn251114860/quicklook/glg_healpix_all_bn251114860.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251114860/quicklook/glg_lc_medres34_bn251114860.gif