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A New Estimate of the Extragalactic Gamma-ray Background from EGRET Data (2003)

Reimer, O. ; Strong, A. ; Moskalenko, I. V.

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Publication Date: 2019-07-18

Description: We use the GALPROP model for cosmic-ray propagation to obtain our best prediction of the Galactic component of gamma rays, and show that away from the Galactic plane it gives an accurate prediction of the observed Energetic Gamma Ray Experiment Telescope (EGRET) intensities. On this basis we re-evaluate the isotropic extragalactic gamma-ray background. We find that for some energies previous work underestimated the Galactic contribution and hence overestimated the background. Our new background spectrum shows a positive curvature similar to that expected for models of the extragalactic emission based on the blazar population.

Keywords: Space Radiation

Type: 28th ICRC Meeting; Jul 31, 2003 - Aug 07, 2003; Japan

Format: text

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