X-ray Imaging and Spectral Statistics of Small Solar Flares Observed with
RHESSI
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I will present x-ray imaging and spectral analysis of all microflares
the Reuven Ramatay High Energy Solar Spectroscopic Imager (RHESSI)
observed between March 2002 and March 2007, a total of 24,799 events.
These microflares are small flares, below C Class, and were found by
searching 6-12 keV during periods when the full sensitivity of RHESSI's
detectors were available. Each microflares is automatically analysed:
the thermal source size is found by forward fitting the complex
visibilities for 4-8 keV and the spectral parameters (temperature,
emission measure, power-law parameters) are found by forward fitting
a thermal plus non-thermal model. This wealth of information allows
us to investigate many aspects of these microflares and in particular
the thermal and non-thermal energy distribution of these events.