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RHESSI vs. RESIK Observations of Thermal Flare X-ray Emission
Cristina Chifor, Ken Phillips, and Brian Dennis
abstract: RHESSI was launched in February 2002 and continues to make imaging and spectroscopic observations of solar flares in both X-rays and gamma rays. Free-free and free-bound continuum together with emission lines are seen in the 'soft' X-ray range (~5 - 20 KeV) from flare plasmas with temperatures from ~ 7 MK to tens of MK. Comparisons between the lower end of RHESSI spectral range and RESIK channels 1 - 4, in 1st order diffraction, provide a useful means of cross-calibration. Also, Fe XXV line emission at ~ 6.7 keV seen by RESIK in 3rd order diffraction, enables cross-calibrations with RHESSI Fe fluxes observed with a 1 keV FWHM resolution above the continuum. Instrumental effects on RHESSI's low energy limit, such as attenuators present during intense flares, will be discussed. An overview of the RHESSI data access and the analysis software will also be given.
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