title: Lunar Occultation of X-ray Emission from the Crab Nebula.
abstract: The x-ray flux from the Crab Nebula was observed during a lunar occultation on 7 July 1964. As the moon covered the central region of the nebula, the x-ray flux decreased gradually. The source appears to extend over a volume about 1 light-year in diameter.
authors.forename: S
authors.initials: S
authors.lastname: Bowyer
authors.forename: E T
authors.initials: ET
authors.lastname: Byram
authors.forename: T A
authors.initials: TA
authors.lastname: Chubb
authors.forename: H
authors.initials: H
authors.lastname: Friedman