Cosmic-Ray Background Flux Model based on a Gamma-Ray Large-Area Space Telescope Balloon Flight Engineering Model

Abstract

Cosmic-ray background fluxes were modeled based on existing measurements and theories and are presented here. The model, originally developed for the Gamma-ray Large Area Space Telescope (GLAST) Balloon Experiment, covers the entire solid angle ($4\pi \mathrm{sr}$), the sensitive energy range of the instrument ($\sim 10MeVto100GeV$) and abundant components (proton, alpha, $e^{-}$, $e^{+}$, ${\mu }^{-}$, ${\mu }^{+}$ and gamma). It is expressed in analytic functions in which modulations due to the solar activity and the Earth geomagnetism are parameterized. Although the model is intended to be used primarily for the GLAST Balloon Experiment, model functions in low-Earth orbit are also presented and can be used for other high energy astrophysical missions. The model has been validated via comparison with the data of the GLAST Balloon Experiment.

35 pages with 14 figures, accepted for publication (ApJ)

References in corpus (8)

• Production and propagation of cosmic-ray positrons and electrons
• EGRET Observations of the Extragalactic Gamma Ray Emission
• Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer
• Protons in near earth orbit
• Measurement of the flux of atmospheric muons with the CAPRICE94 apparatus
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• Gamma ray Large Area Space Telescope (GLAST) Balloon Flight Engineering Model: Overview
• Gamma Ray Large Area Space Telescope (GLAST) Balloon Flight Data Handling Overview

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