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Observational evidence for extraterrestrial gamma-ray line sources (1978)

Willett, J. B. ; Mahoney, W. A. ; Jacobson, A. S. ; [et al.]

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Publication Date: 2019-06-27

Description: During the 1974 balloon flight of a high spectral resolution gamma-ray telescope, observing in the energy range of about 50 keV to 10 Mev, evidences were gathered for two cosmic sources of gamma-ray lines. These are a 73 keV line feature superimposed on a power law continuum spectrum in the 55 to 300 keV range from the Crab nebula; and a flare-like event lasting about twenty minutes, during which four intense gamma-ray lines were measured at .41, 1.79, 2.22 and 5.95 MeV. The properties and operation of the detector used are described. The measured spectrum and count rate are discussed.

Keywords: SPACE RADIATION

Type: NASA. Goddard Space Flight Center Gamma Ray Spectry. in Astrophys.; p 228-251

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