Fig. 7

Box-plots of the MCMC fit parameters kTp1,kTp2 (upper panel) and τ,σ (bottom panel) in the energy band of 0.16−2.0 keV of RX J0720.4−3125 for different groups combined from multi-epoch pointed XMM-Newton EPIC-pn observations with spectral model of a condensed iron surface and a partially ionized hydrogen atmosphere (for details see text and Table 4).
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