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Interstellar absorption of X-rays emitted by supernova remnants∗

Published online by Cambridge University Press:  14 August 2015

P. Gorenstein ,
E. M. Kellogg  and
H. Gursky
P. Gorenstein
Affiliation:
American Science and Engineering, Cambridge, Mass., U.S.A.
E. M. Kellogg
Affiliation:
American Science and Engineering, Cambridge, Mass., U.S.A.
H. Gursky
Affiliation:
American Science and Engineering, Cambridge, Mass., U.S.A.

Extract

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An X-ray observation of the Cassiopeia Region by the ASE group from a sounding rocket on December 5, 1968, has resulted in the determination of locations for two sources that are precise to about 0.1 of a square degree. The positions of two well-known radio sources Cas A and SN 1572 (Tycho's Supernova), objects which are remnants of relatively recent galactic supernova, are consistent with these locations. Inasmuch as that region of the galaxy does not appear to contain nearly as large a concentration of objects as the galactic center, it is reasonable to make the identification between the X-ray sources and the supernova remnants on the basis of there being a small a priori probability of having an accidental coincidence within 0.1 square degrees. Cas A is almost certainly the same source as Cas XR-1 which the NRL group saw in an earlier survey [1]. During the December flight the Crab nebula was also observed for a short time interval.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 37: Non-Solar X- and Gamma-Ray Astronomy , 1970 , pp. 134 - 137
Copyright
Copyright © Reidel 1970 

References

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