Abstract
THE question of the relative contributions from discrete sources and continuum to the flux of cosmic γ rays is a continuing one, with published estimates varying from a 10% source contribution1 to more than 40%2 and even to a possible 100%3. Since these estimates have mainly been based on parts of the necessarily incomplete set of only 13 known γ-ray sources4, it is not surprising that such a wide variety of conclusions is possible. The basic reason is the limited angular resolution of contemporary γ-ray detectors (≃1.5°), and it is unlikely that great improvements will be made in the near future.
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PROTHEROE, R., STRONG, A., WOLFENDALE, A. et al. The discrete source component of galactic γ rays. Nature 277, 542–543 (1979). https://doi.org/10.1038/277542a0
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DOI: https://doi.org/10.1038/277542a0
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