Analysis of the 1980 November 18 limb flare observed by the hard X-ray imaging spectrometer (HXIS) |
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Authors: | E Haug G Elwert P Hoyng |
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Institution: | 1. Lehrstuhl für Theoretische Astrophysik, Universität Tübingen, D-7400 Tübingen, FRG;7. Laboratory for Space Research, 3527 HS Utrecht, The Netherlands |
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Abstract: | X-ray images of the 18 November 1980 limb flare taken by the HXIS instrument aboard SMM were analysed. The hard X-rays originated from three spots on the SW limb of the solar disk with different altitudes and time evolution. The locations of the brightest spots in hard and soft X-rays are compared with the predictions of flare models. The X-ray spctra from the pixels with highest count rates can be fitted by power laws. The spatial variation of the spectral index is in agreement with the existence of a non-thermal electron component. |
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