The upper panels show the best-fit temperatures (asterisks) and 1σ uncertainties (boxes) in the soft band for the pn and ACIS (left panel) and in the hard and soft bands for ACIS (right panel). The lower panels show the relative temperature difference, fT = ΔT / ⟨ T ⟩ (diamonds) and its statistical 1σ uncertainty for ACIS soft band – pn soft band (left panel) and ACIS soft band – ACIS hard band (right panel). The dotted and dashed lines show the weighted mean of fT ± the error of the mean.
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