Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..42..245f&link_type=abstract
(COSPAR, Symposium on Fast Transients in X- and Gamma-Rays, Varna, Bulgaria, May 29-31, 1975.) Astrophysics and Space Science, v
Astronomy and Astrophysics
Astrophysics
3
Balloon-Borne Instruments, Crab Nebula, Scintillation Counters, X Ray Sources, Cosmic X Rays, Neutron Stars, Pulsars
Scientific paper
The size of the hard X-ray source in the Crab Nebula was observed with scintillation counters on board two balloons at a lunar occultation on Jan. 24, 1975. The Gaussian width of the source is 34 seconds (+ 17 seconds, -14 seconds) and the center thereof is offset from the pulsar by 6 seconds plus or minus 4 seconds at position angle 102 degrees. The observed time profile can also be fitted to an alternative model of two line sources whose intensities are 48% at 11 seconds and 25.5% at 7 seconds on both sides of the pulsar.
Akiyama Hidefumi
Fukada Yutaka
Hayakawa Saito
Kasahara Izumi
Makino Fumiyoshi
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