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Sub-second variations of high energy ( 300 keV) hard X-ray emission from solar flaresSubsecond variations of hard X-ray emission from solar flares were first observed with a balloon-borne detector. With the launch of the Solar Maximum Mission (SMM), it is now well known that subsecond variations of hard X-ray emission occur quite frequently. Such rapid variations give constraints on the modeling of electron energization. Such rapid variations reported until now, however, were observed at relatively low energies. Fast mode data obtained by the Hard X-ray Burst Spectrometer (HXRBS) has time resolution of approximately 1 ms but has no energy resolution. Therefore, rapid fluctuations observed in the fast-mode HXRBS data are dominated by the low energy hard X-rays. It is of interest to know whether rapid fluctuations are observed in high-energy X-rays. The highest energy band at which subsecond variations were observed is 223 to 1057 keV. Subsecond variations observed with HXRBS at energies greater than 300 keV are reported, and the implications discussed.
Document ID
19870012354
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bai, Taeil
(Stanford Univ. CA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1986
Publication Information
Publication: NASA. Goddard Space Flight Center Rapid Fluctuations in Solar Flares
Subject Category
Solar Physics
Accession Number
87N21787
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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