TITLE:   GCN CIRCULAR
NUMBER:  43380
SUBJECT: GRB 260112B: Fermi GBM Final Real-time Localization
DATE:    26/01/12 20:56:32 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 20:45:51 UT on 12 Jan 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260112B (trigger 789943556.635812 / 260112865).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 238.6, Dec = -3.5 (J2000 degrees, equivalent to J2000 15h 54m, -3d 30'), with a statistical uncertainty of 7.8 degrees.

The angle from the Fermi LAT boresight is 34.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260112865/quicklook/glg_skymap_all_bn260112865.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/bn260112865/quicklook/glg_healpix_all_bn260112865.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260112865/quicklook/glg_lc_medres34_bn260112865.gif