Abstract
IYENGAR et al.1 have reported observations of hard X rays from Her X-1, which seem to set an upper limit of 10% on the pulsating component in the energy range 20 to 45 keV. I offer a simple explanation that does not require the additional source of X rays postulated by Iyengar et al.
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References
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WANG, YM. Nature of Her X-1. Nature 253, 249–250 (1975). https://doi.org/10.1038/253249a0
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DOI: https://doi.org/10.1038/253249a0
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