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A New Determination of the Extragalactic Diffuse Gamma‐Ray Background from EGRET Data

Open access
Strong, Andrew W., Moskalenko, Igor V., Reimer, Olaf·2004·The Astrophysical Journal

Abstract

We use the GALPROP model for cosmic-ray propagation to obtain a new estimate of the Galactic component of γ-rays and show that away from the Galactic plane it gives an accurate prediction of the observed EGRET intensities in the energy range 30 MeV to 50 GeV. On this basis we reevaluate the extragalactic γ-ray background. We find that for some energies previous work underestimated the Galactic contribution at high latitudes 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.

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Metadata

Authors
Strong, A. W., Moskalenko, I. V., & Reimer, O.
Venue
The Astrophysical Journal
Published
2004-10
Volume
613
Issue
2
Pages
956-961
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
OpenAlex
W2057321562
Cited by
320
References
20
FWCI
14.44
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: A New Determination of the Extragalactic Diffuse Gamma‐Ray Background from EGRET Data. https://app.cochat.ai/papers/10.1086/423196
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Strong, A. W., Moskalenko, I. V., & Reimer, O. (2004). A New Determination of the Extragalactic Diffuse Gamma‐Ray Background from EGRET Data. The Astrophysical Journal. https://doi.org/10.1086/423196

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.