The Fermi Gamma‐ray Space Telescope, launched in June 2008, is an international space mission dedicated to the study of the high‐energy gamma rays from the Universe. The main instrument aboard Fermi is the Large Area Telescope (LAT), a pair conversion telescope equipped with the state‐of‐the art in gamma‐ray detectors technology, and operating at energies >30 MeV. During first two months of data taking, Fermi has detected high‐energy gamma rays from the quiet Sun and the Moon. This emission is produced by interactions of cosmic rays; by nucleons with the solar and lunar surface, and electrons with solar photons in the heliosphere. While the Moon was detected by EGRET on CGRO with low statistics, Fermi provides high‐sensitivity measurements on a daily basis allowing both short‐ and long‐term variability to be studied. Since Galactic cosmic rays are at their maximum flux at solar minimum we expect that the quiescent solar and lunar emission to be a maximum during the period covered by this report. Fermi is the only mission capable of monitoring the Sun at energies above several hundred MeV over the full 24th solar cycle. We present first analysis showing images of Moon and the quiet emission of the solar disk, giving a description of the analysis tools used.

Solar System Gamma Ray observations using Fermi‐LAT detector

Nicola Giglietto;
2009

Abstract

The Fermi Gamma‐ray Space Telescope, launched in June 2008, is an international space mission dedicated to the study of the high‐energy gamma rays from the Universe. The main instrument aboard Fermi is the Large Area Telescope (LAT), a pair conversion telescope equipped with the state‐of‐the art in gamma‐ray detectors technology, and operating at energies >30 MeV. During first two months of data taking, Fermi has detected high‐energy gamma rays from the quiet Sun and the Moon. This emission is produced by interactions of cosmic rays; by nucleons with the solar and lunar surface, and electrons with solar photons in the heliosphere. While the Moon was detected by EGRET on CGRO with low statistics, Fermi provides high‐sensitivity measurements on a daily basis allowing both short‐ and long‐term variability to be studied. Since Galactic cosmic rays are at their maximum flux at solar minimum we expect that the quiescent solar and lunar emission to be a maximum during the period covered by this report. Fermi is the only mission capable of monitoring the Sun at energies above several hundred MeV over the full 24th solar cycle. We present first analysis showing images of Moon and the quiet emission of the solar disk, giving a description of the analysis tools used.
6th Workshop on High Energy Gamma-Ray Experiments
978-0-7354-0649-0
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11589/21594
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