VHE gamma ray absorption by galactic interstellar radiation field
Jian-Li Zhang, Xiao-Jun Bi, Hong-Bo Hu
Abstract
Adopting a recent calculation of the Galactic interstellar radiation field, we calculate the attenuation of the very high energy gamma rays from the Galactic sources. The infra-red radiation background near the Galactic Center is very intense due to the new calculation and our result shows that a cutoff of high energy gamma ray spectrum begins at about 20 TeV and reaches about 10% for 50 TeV gamma rays.
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