GCN Circular 45124

C. Malacaria (INAF-OAR) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:

"At 10:11:16.89 UT on 08 July 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260708A (trigger 805198281/260708424). The Final real-time localization was reported in GCN 45115

The GBM light curve displays a sharp peak with a duration (T90) of about 62 s (50-300 keV). The time-averaged spectrum from T0+0.5 to T0+49.7 s is best fit by a power law function with a power law index of -1.86 +/- 0.01 .

The event fluence (10-1000 keV) in this time interval is (2.14 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.5 s in the 10-1000 keV band is 19.6 +/- 0.5 ph/s/cm^2.

The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html

For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"