TITLE:   GCN CIRCULAR
NUMBER:  45425
SUBJECT: GRB260822B: Fermi GBM Final Localization
DATE:    26/08/22 22:51:06 GMT
FROM:    oindabimukherjee@gmail.com

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

"At 20:21:03.83 UT on 22 August 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB260822B (trigger 809122868/260822848).
This trigger was initially classified as Below horizon by the flight software,
but is in fact a GRB.

The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 173.93, Dec = 18.48 (J2000 degrees, equivalent to J2000 11h 35m, +18d 28'),
with a statistical uncertainty of 6.94 degrees.

The angle from the Fermi LAT boresight is 102 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260822848/quicklook/glg_skymap_all_bn260822848.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/bn260822848/quicklook/glg_healpix_all_bn260822848.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260822848/quicklook/glg_lc_medres34_bn260822848.gif"