 |
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| * |
For older SNRs,
shock heat gas to
|
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temperatures ~
few x 106 K, where the
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|
plasma should
radiate primarily via line
|
|
emission from
K-shell O and L-shell
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Fe.
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| * |
Previous searches
with crystal
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|
spectrometers
had been inconclusive.
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| * |
The HEAO A-2
LEDs were the best
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|
calibrated low
energy prop counters yet
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flown. Although the resolution was not
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sufficient to
see line emission in the
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raw data, Kahn et
al. invoked a
|
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deconvolution
procedure to
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demonstrate its
presence conclusively.
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| * |
The
derived temperature was ~ 3 x 106
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K, with some
evidence for
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multitemperature
emission and/or
|
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nonequilibrium
effects.
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