GCN Circular 42676
Subject
GRB 251114A: Fermi GBM Final Real-time Localization
Event
Date
2025-11-14T01:23:52Z (2 days ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 01:13:11 UT on 14 Nov 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251114A (trigger 784775596.257482 / 251114051).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 312.9, Dec = 9.0 (J2000 degrees, equivalent to J2000 20h 51m, 9d 00'), with a statistical uncertainty of 4.2 degrees.
The angle from the Fermi LAT boresight is 82.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251114051/quicklook/glg_skymap_all_bn251114051.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/bn251114051/quicklook/glg_healpix_all_bn251114051.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251114051/quicklook/glg_lc_medres34_bn251114051.gif