A Multiwavelength Analysis of the Long-duration Flare Observed on 15 April 2002

摘要: We present a multiwavelength analysis of the long-duration flare observed on 15 April 2002 (soft X-ray peak time at 03:55 UT, SOL2002-04-15T03:55). This occurred disk (S15W01) in NOAA 9906 and was by number space instruments including Extreme-Ultraviolet Imaging Telescope Solar Heliospheric Observatory (SOHO/EIT), RESIK spectrometer onboard Coronas-F spacecraft, Ramaty High Energy Spectroscopic Imager (RHESSI). have performed complex these measurements studied morphology physical parameters characterizing conditions flaring plasmas. The 195 A SOHO/EIT images been used to study evolution loops. Analysis RHESSI data provided opportunity for detailed hard emission with 1 keV energy resolution. Geostationary Operational Environmental Satellite (GOES) observations isothermal interpretation measurements. Temperature diagnostics plasma carried out means differential measure (DEM) based spectra. The DEM distributions were calculated two methods: Withbroe–Sylwester (WS) (DE). Both approaches similar results. obtained two-component independent evolutionary phase. found that amount thermal this is order 1030 ergs. values assuming an model are lower than those determined from distributions.