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Iain Hannah   Submitted: 2008-01-03 12:16

We present X-ray imaging and spectral analysis of all microflares the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) observed between March 2002 and March 2007, a total of 25,705 events. These microflares are small flares, from low GOES C Class to below A Class (background subtracted) and are associated with active regions. They were found by searching the 6-12 keV energy range during periods when the full sensitivity of RHESSI's detectors was available (see paper I). Each microflare is automatically analyzed at the peak time of the 6-12 keV emission: 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 index) are found by forward fitting a thermal plus non-thermal model. The combination of these parameters allows us to present the first statistical analysis of the thermal and non-thermal energy at the peak times of microflares. ################## This article is part 2 of a RHESSI microflare statistics study. Part 1 is Christe et al. 2008.

Authors: I. G. Hannah, S. Christe, S. Krucker, G. J. Hurfod, H. S. Hudson and R. P. Lin
Projects: RHESSI

Publication Status: ApJ Accepted
Last Modified: 2008-01-03 14:00
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