The upper panels show the best-fit temperatures (asterisks) and the 1σ uncertainties (boxes) in the hard band obtained with the XMM-Newton instruments pn (left panel), MOS1 (middle panel) and MOS2 (right panel). The lower panels show the relative temperature difference, fT = ΔT / ⟨ T ⟩ (diamonds), and its 1σ uncertainty for MOS1-pn (left panel), MOS2-pn (middle panel) and MOS2-MOS1 (right panel). The dotted and dashed lines show the weighted mean of fT ± the error of the mean.
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