Roger Blandford

TL;DR: This work measures, for the first time, the source count distribution, dN/dS, of extragalactic γ-ray sources at E>50 GeV and finds that it is compatible with a Euclidean distribution down to the lowest measured source flux in the 2FHL.

TL;DR: In this paper, the gamma-ray observations with the LAT on board the Fermi Gamma-Ray Telescope of the nearby radio galaxy Centaurus~A were used for the detection of the lobes by the LAT; the LAT core spectrum, extrapolated to higher energies, is marginally consistent with the non-simultaneous HESS spectrum of the source.

TL;DR: The Large Area Telescope (LAT) instrument on the Fermi Gamma-Ray Space Telescope has measured the diffuse gamma-ray emission with improved sensitivity and resolution compared to EGRET, and the LAT spectrum for this region of the sky is well reproduced by a diffuse galactic gamma-rays emission model that is consistent with local CR spectra and inconsistent with the EGRET GeV excess.

TL;DR: Les taux de reactions and les distributions d'energies dans les plamas paires relativistes sont determines for les processus elementaires suivants : la diffusion Compton, l'annihilation paire, la production paire 2 photons, la diffusion Coulomb and le rayonnement de freinage e-e as discussed by the authors.

TL;DR: In this paper, the authors used 546 days of continuous sky-survey observations obtained with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope to study the gamma-ray emission towards 13 globular clusters.