GCN Circular 44300
Subject
GRB 260415B: Fermi GBM Final Localization
Event
Date
2026-04-15T05:51:24Z (9 days ago)
From
Lorenzo Scotton at UAH <lscottongcn@outlook.com>
Via
Web form
The Fermi GBM team reports the detection of a likely LONG GRB
"At 02:25:33.80 UT on 15 April 2026, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 260415B (trigger 797912738/260415101).
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 229.43, Dec = 24.94 (J2000 degrees, equivalent to J2000 15h 18m, +24d 56'),
with a statistical uncertainty of 9.03 degrees.
The angle from the Fermi LAT boresight is 41 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260415101/quicklook/glg_skymap_all_bn260415101.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/bn260415101/quicklook/glg_healpix_all_bn260415101.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260415101/quicklook/glg_lc_medres34_bn260415101.gif"