Comparative analysis of X-Ray flares

Abstract

In order to interpret the intervening processes in the energy release during solar flares, an statistical study in 20 events produced in solar active regions, was performed. Their intensities comprises a wide range including from the more intense flares up to microflares. We analyze X2-ray data obtained from the Hard X-Ray Imaging Spectrometer (HXIS) and the Hard X-Ray Burst Mission satellite. We establish correlations among the maximum counting rates in soft and hard X-rays, their slopes, the integrated counting rates over all both HXIS and HXRBS spectral ranges, and the total duration of the events. The results of the correlation coefficients suggest a strong causality between the hard (> 16 keV), and soft X-ray brightening, responsible of the hard X-ray emission during the flare impulsive phase, loose afterwards their energy, producing the soft X-ray emission.