Abstract
The invariable point of non-thermal electrons was proposed two years ago, based on analyzing the two intense gamma-ray line flares observed with the X2 detector on GRS/SMM. Due to too strong hard X-ray flux in those two flares, the influence of pile-up effect might not be fully excluded. In this paper, we check the invariable point by using some medium hard X-ray events observed with HXRBS/SMM and BATSE/CGRO. It is found that the invariable point could indeed appear in some weaker hard X-ray events, in which the pile-up effect cannot play a role. Further refinement should be based on the observations with a high energy resolution.
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Gan, W., Chang, J. & Ma, T. A Clarification on the invariable point in the power-law energy spectra of non-thermal electrons of solar flares. Astrophysics and Space Science 288, 347–351 (2003). https://doi.org/10.1023/B:ASTR.0000005099.63788.34
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DOI: https://doi.org/10.1023/B:ASTR.0000005099.63788.34