RESIK and RHESSI observations of the 20 September 2002 flare

摘要: Soft X-ray spectra 3.33 A - 6.15 from the RESIK instrument on CORONAS-F constitute a unique database for study of physical conditions solar flare plasmas, enabling calculation differential emission measures. The two channels shortest wavelengths overlap with lower end RHESSI spectral energy range, which is located around 3 keV, making it possible to compare both data sets. We aim observations and spectrometers cross-correlate these instruments. Observations are compared synthetic calculated based results one-dimensional hydrodynamical (1D-HD) modelling. analysis was performed 20 September 2002. estimated geometry flaring loop, necessary 1D-HD modelling, images SOHO/EIT. distribution non-thermal electrons (NTEs) determined spectra. model assumes that power-law spectrum were injected at apex loop. NTEs then heat evaporate chromosphere, filling loop hot dense plasma radiating in soft X-rays. total constrained by comparing observed fluxes GOES 1 8 data. temperature density every point throughout evolution flare, calculating resulting hydrodynamic modelling 2002 consistent within factor during most duration flare. This discrepancy probably related uncertainty cross-calibration between