Elemental Abundances as a New Source of Uncertainty of the Hinode/XRT Filter-ratio T and EM Analysis

摘要

We calculated the Hinode/XRT temperature response functions with different assumptions of elemental abundances. The enhancement of the low FIP elements significantly affects the amplitude of the XRT response curves. This yields a significant difference in the emission measures calculated from the filter ratio method, while the effect on derived temperatures is relatively small.