Shot-noise character of hard X-ray emission in a solar flare

Details Shot-noise character of hard X-ray emission in a solar flare Shot-noise character of hard X-ray emission in a solar flare

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232..590f&link_type=abstract

Astrophysical Journal, Part 1, vol. 232, Sept. 1, 1979, p. 590-594.

Statistics

8

Power Spectra, Shot Noise, Solar Flares, Solar X-Rays, Balloon-Borne Instruments, Magnetohydrodynamics, Poisson Density Functions, Solar Electrons

Scientific paper

Power spectrum analysis of the hard X-ray flux of a -B flare, detected on 1974 July 6 at 10h 37m UT during a balloon flight, has shown that the intensity is not consistent with nonstationary Poisson statistics for the distribution of detected photons, i.e., correlations are present in the frequency range 0.5-50 Hz. The measured power spectrum, in fact, may be consistently interpreted as being due to a nonstationary shot-noise process, suggesting a model for the emission where elementary spikes having decay times of 120 ms are superposed at a variable rate, thus reproducing the time profile of the burst.

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