Abstract

MOST of the X-ray emission from the Crab Nebula is from a diffuse cloud approximately 100″ in size1,2, and about 10 per cent of the total X-ray flux is in pulsed form3,4, presumably from the optical pulsar. Slysh5 suggests that all of the X-ray flux originates in pulsed form at the pulsar and that scattering by grains washes out the time coherence and produces the observed angular size. This article is a discussion of the hypothesis of Slysh from the observational point of view.

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