Abstract
THE intensity of X-rays in the energy range 22.5–154 keV from the X-ray source Cyg X–1 was monitored for about 3 h on the night of April 5, 1971, using a balloon-borne telescope. There were pronounced variations in the intensity and presumably energy spectrum of the source in time periods of the order of a few minutes.
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References
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AGRAWAL, P., GOKHALE, G., IYENGAR, V. et al. Rapid Variations in the High Energy X-ray Flux from Cyg X-1. Nature 232, 38–40 (1971). https://doi.org/10.1038/232038a0
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DOI: https://doi.org/10.1038/232038a0
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