GCN Circular 45319
Subject
GRB 260808C: Fermi GBM Final Real-time Localization
Event
Date
2026-08-08T16:34:47Z (15 days ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely SHORT GRB
At 16:24:14 UT on 8 Aug 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260808C (trigger 807899059.114984 / 260808683).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 214.2, Dec = 34.1 (J2000 degrees, equivalent to J2000 14h 16m, 34d 06'), with a statistical uncertainty of 13.2 degrees.
The angle from the Fermi LAT boresight is 36.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260808683/quicklook/glg_skymap_all_bn260808683.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/bn260808683/quicklook/glg_healpix_all_bn260808683.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260808683/quicklook/glg_lc_medres34_bn260808683.gif