Abstract
Recent observations in the X- and γ-ray region of the electromagnetic spectrum have given strong evidence for the existence of an extragalactic intensity with a slowly steepening power law spectrum in the region 103 to 108 eV. Further data from the OSO-III high energy γ-ray detector are in agreement with earlier published reports, and suggest that the γ-rays from high galactic latitudes have a softer spectrum than those from the galactic plane.
Supported in part by the National Aeronautics and Space Administration under contract NAS5-3205, grant NsG-386 (MIT), grant NSG-426 (CIT), and NGR 50-002-044 (University of Wisconsin).
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Clark, G.W., Garmire, G.P., Kraushaar, W.L. (1970). Review of Observational Results on γ-Ray Background. In: Gratton, L. (eds) Non-Solar X- and Gamma-Ray Astronomy. International Astronomical Union/Union Astronomique Internationale, vol 37. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3311-4_45
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