Joint Time-Frequency Analysis of Solar Flare Hard X-Ray Observations

Details Joint Time-Frequency Analysis of Solar Flare Hard X-Ray Observations Joint Time-Frequency Analysis of Solar Flare Hard X-Ray Observations

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spd....28.0161d&link_type=abstract

American Astronomical Society, SPD meeting #28, #01.61; Bulletin of the American Astronomical Society, Vol. 29, p.890

Astronomy and Astrophysics

Astronomy

Scientific paper

Many flares have an impulsive phase in hard X-rays followed by a period of more gradually varying emission. This general trend in the timescale of the variations from <1 s early in a flare to as long as several minutes in the later phases can tell us about the energy release and particle acceleration processes if we know how to interpret it. We are investigating several methods of quantifying this change including the use of the short-time Fourier transform, the Gabor transform, and various types of wavelet analysis tools. Preliminary results will be presented from applying these techniques to HXRBS and BATSE hard X-ray time profiles of several flares.

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