GCN 43376: GRB 260112A: Fermi GBM Final Real-time Localization

2026-01-12T05:36:31.314Z | rev 0 | event: GRB 260112A

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

At 05:25:50 UT on 12 Jan 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260112A (trigger 789888355.72541 / 260112226).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 326.5, Dec = -37.8 (J2000 degrees, equivalent to J2000 21h 45m, -37d 47'), with a statistical uncertainty of 18.3 degrees.

The angle from the Fermi LAT boresight is 112.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260112226/quicklook/glg_skymap_all_bn260112226.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260112226/quicklook/glg_healpix_all_bn260112226.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260112226/quicklook/glg_lc_medres34_bn260112226.gif