GCN Circular 45910
Subject
GRB 261011B: Fermi GBM Final Localization
Event
Date
2026-10-11T21:40:10Z (2 days ago)
From
Eva MP at INAOE <eva.palafox@gmail.com>
Via
Web form
The Fermi GBM team reports the detection of a likely LONG GRB
"At 17:26:50.57 UT on 11 October 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 261011B (trigger 813432415/261011727).
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 185.63, Dec = -38.37 (J2000 degrees, equivalent to J2000 12h 23m, -38d 22')
with a statistical uncertainty of 4.2 degrees.
The angle from the Fermi LAT boresight is 83 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261011727/quicklook/glg_skymap_all_bn261011727.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/bn261011727/quicklook/glg_healpix_all_bn261011727.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn261011727/quicklook/glg_lc_medres34_bn261011727.gif"