Abstract
Thermal bremsstrahlung from the X-ray observed plasma accounts for most of the observed 9.1 cm emission from McMath 12336, an old, spotless active region, on June 2, 1973. This implies that only a small fraction of the emission measure within the active region is in the range around 106 K and below.
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Gerassimenko, M., Nolte, J.T. & Petrasso, R.D. Comparison of the 9.1cm and soft X-ray emission from an active region. Sol Phys 48, 121–125 (1976). https://doi.org/10.1007/BF00153338
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DOI: https://doi.org/10.1007/BF00153338