GCN Circular 45200
Subject
GRB 260723A: Fermi GBM Final Localization
Event
Date
2026-07-23T21:06:26Z (17 days ago)
From
Suman Bala at USRA <sumanbala2210@gmail.com>
Via
Web form
The Fermi GBM team reports the detection of a likely LONG GRB.
"At 13:54:48.40 UT on 23 July 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260723A (trigger 806507693/260723580).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 284.5, Dec = 7.7 (J2000 degrees, equivalent to J2000 18h 57m, +7d 42'), with a statistical uncertainty of 9.5 degrees.
The angle from the Fermi LAT boresight is 87 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260723580/quicklook/glg_skymap_all_bn260723580.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/bn260723580/quicklook/glg_healpix_all_bn260723580.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260723580/quicklook/glg_lc_medres34_bn260723580.gif"