Abstract
The size of the hard X-ray source in the Crab Nebula was observed with scintillation counters on board two balloons at a lunar occulatation on 24 January, 1975. The Gaussian width of the source is 34″ (+17″, −14″) and the center thereof is offset from the pulsar by 6″±4″ at position angle 102°. The observed time profile can also be fitted to an alternative model of two line sources whose intensities are 48% at 11″ and 25.5% at 7″ on both sides of the pulsar.
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Fukada, Y., Hayakawa, S., Kasahara, I. et al. Size of the hard X-ray source in the Crab Nebula. Astrophys Space Sci 42, 245–248 (1976). https://doi.org/10.1007/BF00645548
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DOI: https://doi.org/10.1007/BF00645548