GCN Circular 46195
Subject
GRB 261108B: Fermi GBM Final Localization Correction
Event
Date
2026-11-08T16:12:07Z (21 hours ago)
From
A. Holzmann Airasca at University of Trento and INFN Bari <a.holzmannairasca@unitn.it>
Via
Web form
The Fermi GBM team reports the detection of a likely LONG GRB
"At 05:37:34.86 UT on 08 November 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 261108B (trigger 815809059/261108234).
This trigger was initially classified as Distant Particles by the flight software,
but is in fact a GRB.
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 264.86, Dec = 80.18 (J2000 degrees, equivalent to J2000 17h 39m, +80d 10'),
with a statistical uncertainty of 1.57 degrees.
The angle from the Fermi LAT boresight is 62 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261108234/quicklook/glg_skymap_all_bn261108234.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/bn261108234/quicklook/glg_healpix_all_bn261108234.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261108234/quicklook/glg_lc_medres34_bn261108234.gif"