Determination of the source height and anisotropy of solar hard X-rays by measurements with good time resolution |
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| Authors: | Taeil Bai |
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| Institution: | (1) Department of Physics, University of California, 92093 San Diego, La Jolla, USA |
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| Abstract: | When emitted at the same time, solar hard X-rays reflected by the photosphere arrive at an observer at later times than primary hard X-rays coming directly from the source. This time lag of albedo photons, therefore, should be taken into account in interpreting fine-scale hard X-ray time profiles. If hard X-ray bursts consist of succession of short-lived  elementary bursts , under favorable conditions reflected hard X-rays can be resolved from primary hard X-rays with good time resolution. If so, from the time lag and the ratio of the albedo flux to the primary flux, one can determine the source height and anisotropy of solar hard X-rays. |
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