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Hard X-Ray Timing Experiments with HESSI View all abstracts by submitter

Markus J Aschwanden   Submitted: 1999-11-04 18:01

We design three high-precision timing experiments that can be pursued with HESSI: (1) relative timing of magnetically conjugate footpoint hard X-ray sources (similar to previous studies by Sakao), (2) relative timing between footpoint and looptop or above-the-loop-top sour-ces (in the case of Masuda-ty- Masuda-type flares), and (3) relative timing between electrons (in hard X-rays) and protons (in gamma-rays). Re-analyzing Sakao's simultaneity measurements between conjugate footpoints in 14 flares we confirm his results and find an average uncertainty of {sigma} auapprox pm 250 ms for HXT (with a signal-to-noise ratio of 10: 1), which can be improved down to {sigma} au- {sigma} auapprox pm 22 ms for HESSI (for a signal-to-noise ratio of 100: 1). These timing experiments are expected to convey new information on the particle kinematics in solar flares.

Authors: Markus J. Aschwanden

Publication Status: ASP Conf.Ser., High Energy Solar Physics: Anticipating HESSI, (R.Ramaty and N.Mandzhavidze eds.), subm. 1999 Nov 4.
Last Modified: 1999-11-04 18:01
Go to main E-Print page  Determination of the Abundances of Subcoronal He and of Solar Flare Accelerated He-3 and He-4 from Gamma-Ray Spectroscopy
  Gamma Rays from Solar Flares
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