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Soft X-ray observations of the supernova remnants HB 3 and 3C 58
Galas, C. M. F.; Tuohy, I. R.; Garmire, G. P.
AA(Calgary, University, Calgary, Alberta, Canada), AB(California Institute of Technology, Pasadena, Calif.), AC(California Institute of Technology, Pasadena, Calif.)
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 236, Feb. 15, 1980, p. L13-L16. National Research Council (ApJL Homepage)
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NASA/STI Keywords:
Heao 1, Supernova Remnants, X Ray Sources, Bremsstrahlung, Hydrogen Clouds
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The HEAO 1 A-2 low energy detectors have discovered soft X-ray emission from a source positionally coincident with the supernova remnant HB 3. The flux in the energy range 0.3-2.2 keV is about 6 x 10 to the -11th ergs per sq cm s. The spectral data are fitted to a hydrogen thermal bremsstrahlung model, and the physical parameters of the supernova remnant are estimated. The age derived is about 21,000 years, and the initial blast energy is about 3.1 x 10 to the 50th ergs. Upper limits to the soft X-ray flux and the luminosity of the supernova remnant 3 C 58 are also derived.

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