Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-07-02
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
Proceedings of the 31st ICRC, Lodz, Poland, July 2009. Paper ID 0390
Scientific paper
The LAT instrument on the Fermi Gamma-Ray Space Telescope is performing an all-sky survey from 20 MeV to 300 GeV with unprecedented statistics and angular resolution. This is providing a wealth of new information on the non-thermal emission from the Galactic interstellar medium with implications for cosmic rays and Galactic structure. First results at intermediate latitudes have already shown good agreement with predictions based on direct measurements of cosmic rays, suggesting that at least the local (within about 1 kpc from the Sun) gamma-ray emission is understood. We will present the first spectra from regions over the sky using the LAT data, and profiles for selected energies. The aim here is to evaluate the agreement with the models and assess what we can expect to learn as this analysis matures.
for the Fermi-LAT Collaboration
Strong Andrew W.
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