Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-12-18
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
2009 Fermi Symposium, eConf Proceedings C091122, 5 pages, 4 figures
Scientific paper
We report the detection of the lunar gamma-ray emission during the first year of Fermi-LAT observations. Such emission is produced by cosmic ray nuclei interacting with the lunar surface. Thanks to the solar minimum conditions and the reduced effects of heliospheric modulation, the lunar flux was at its maximum due to the increased flux of Galactic cosmic rays hitting the lunar surface. Fermi-LAT instrument has a superior sensitivity, angular resolution, and observes the whole sky every two orbits. It is the only gamma-ray mission capable of detecting the lunar emission with high confidence and to monitor it over the full 24th solar cycle. We also report the status of a search of the gamma-ray emission from major planets and asteroid populations in the ecliptic plane.
for the Fermi Large Area Telescope Collaboration
Giglietto Nicola
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