The upper panels show the best-fit temperatures (asterisks) and 1σ uncertainties (boxes) for the Fe XXV/XXVI line ratio temperatures vs. the 2−6 keV band continuum for the pn (left panel) and MOS (right panel). The lower panels show the relative temperature difference fT (i.e. the 2−6 keV band continuum temperature minus the Fe XXV/XXVI line ratio temperature, divided by the mean of the two) and its 1σ uncertainty for the pn (left panel) and MOS (right panel). The dotted and dashed lines show the weighted mean of fT ± the error of the mean.
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