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The X-Ray Pulsed Fraction of NP0532 and Interstellar Grains

Published online by Cambridge University Press:  25 April 2016

R.M. Thomas
R.M. Thomas*
Affiliation:
Department of Physics, University of Tasmania
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Extract

In this paper we report that the available data on the measured pulsed fraction of X-rays from the Crab Nebula between the energies 0.7 and 300 keV indicate that it is no longer necessary to postulate an intrinsic change in the pulsar spectral index near 30 keV. Furthermore the spectral flattening which is evident at low energies can be entirely attributed, within the precision of the available statistics to the destruction of time coherence of the pulse structure by the scattering action of interstellar dust grains.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 2 , Issue 6 , October 1975 , pp. 325 - 327
Copyright
Copyright © Astronomical Society of Australia 1975

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