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

2009/07/03 by H. Tajima, Tajima, Hiroyasu · 1 citation
Medicine · Physics and Astronomy · #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Nuclear Physics and Applications #Radiation Therapy and Dosimetry

paper · pdf · doi:10.48550/arxiv.0907.0714

openalex publication_date 2009/07/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 MeV emission and lasted much longer even after photons with E<100 MeV became undetectable. The redshift from GROND of z~4.35 means that this GRB has the largest reported apparent isotropic gamma-ray energy release, E_iso ~ 8.8 x10⁵⁴ ergs. It also sets a stringent lower limit on the GRB outflow Lorentz factor, Gamma_min~890, and limits the quantum gravity mass scale, M_QG > 1.3 x 10¹⁸ GeV/c².

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