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Title:
A 153 day periodicity in the occurrence of solar flares producing energetic interplanetary electrons
Authors:
Droege, Wolfgang; Gibbs, Kenneth; Grunsfeld, John M.; Meyer, Peter; Newport, Brian J.; Evenson, Paul; Moses, Dan
Affiliation:
AA(Chicago, University, IL), AB(Chicago, University, IL), AC(Chicago, University, IL), AD(Chicago, University, IL), AE(Chicago, University, IL)
Publication:
NASA and University of New Hampshire, Workshop on Impulsive Solar Flares, 2nd, Durham, NH, Sept. 26-28, 1988 Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 73, June 1990, p. 279-283. Research supported by the W. D. Grainger Foundation. (ApJS Homepage)
Publication Date:
06/1990
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
High Energy Electrons, Interplanetary Medium, Solar Flares, Gamma Rays, International Sun Earth Explorer 3, Power Spectra, Solar X-Rays
DOI:
10.1086/191463
Bibliographic Code:
1990ApJS...73..279D

Abstract

The occurrence times of energetic (above 10 MeV) solar flare electron events observed on board the ISEE 3 spacecraft during the years 1978-1982 have been examined; strong evidence is found for a periodicity of 153 + or - 2 days, confirming the discovery of a periodicity in the occurrence of solar flares producing X-rays and gamma rays. The Rayleigh test for periodicity is applied to obtain a probability of less than 10 to the -6th that the times of the electron flares were drawn from a uniform distribution.

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