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X-ray spectrum of Cassiopeia A measured with the Einstein SSSThe solid state spectrometer (SSS) on the Einstein Observatory observed the X-ray spectrum of Cas A between 0.8 and 4.5 keV with a FWHM energy resolution of 160 eV. Line emission consistent with transitions of helium-like ions of Si, S, and Ar was well defined. Comparison between the data and the emission expected from a gas containing two distinct thermal components requires additional line emission from Mg, Al, Ca, and Fe. These results are discussed in the context of both equilibrium and nonequilibrium situations.
Document ID
19800054003
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/183112
Authors
Becker, R. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Smith, B. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
White, N. E. (NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt; Maryland, University, College Park, Md., United States)
Holt, S. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Boldt, E. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mushotzky, R. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Serlemitsos, P. J. (NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt, Md., United States)
Date Acquired
August 10, 2013
Publication Date
November 15, 1979
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
80A38173
Distribution Limits
Public
Copyright
Other

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