• Corpus ID: 118959747

A new estimate of the extragalactic gamma-ray background from EGRET data

@inproceedings{Strong2003ANE,
  title={A new estimate of the extragalactic gamma-ray background from EGRET data},
  author={A. W. Strong and Igor V. Moskalenko and O. Reimer},
  year={2003}
}
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… 
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References

SHOWING 1-5 OF 5 REFERENCES
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AIP Conference Proceedings 510
  • AIP Conference Proceedings 510
  • 2000
Scaling factors of components of Galactic diffuse emission All-sky Energy, MeV Total
  • AIP Conference Proceedings 510,
  • 2000
ApJ
  • ApJ
  • 1998
ApJ
  • ApJ
  • 1998