Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1085..763a&link_type=abstract
HIGH ENERGY GAMMA-RAY ASTRONOMY: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conferenc
Other
7
Gamma-Ray, X- And Gamma-Ray Telescopes And Instrumentation, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays
Scientific paper
The Fermi Gamma-Ray Space Telescope with its main instrument the LAT is the most sensitive γ-ray telescope in the energy region between 30 MeV and 100 GeV. One of the prime scientific goals of this mission is the measurement and interpretation of the diffuse Galactic and extragalactic γ-ray emission. While not limited by photon statistics, this analysis presents several challenges: Instrumental response functions, residual background from cosmic rays as well as resolved and unresolved foreground γ-ray sources have to be taken carefully into account in the interpretation of the data. Detailed modeling of the diffuse γ-ray emission is being performed and will form the basis of the investigations. We present the analysis approach to be applied to the Fermi LAT data, namely the modeling of the diffuse emission components and the background contributions, followed by an all-sky maximum-likelihood fitting procedure. We also report on the performance of this method evaluated in tests on simulated Fermi LAT and real EGRET data.
Ackermann Markus
Digel Seth
Jóhannesson Guðlaugur
Moskalenko Igor V.
Porter Troy
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