Fermi Observations of high-energy gamma-ray emissions from GRB 080916C

Observations of the long-duration Gamma-Ray Burst GRB 080916C by the Fermi Gamma-ray Burst Monitor and Large Area Telescope show that it has a single spectral form from 8 keV to 13.2 GeV. The E > 100 MeV emission was ≈ 5 s later than the E 1.3× 10 GeV/c.