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Fig. 4

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Ratio of the data to the continuum model at the Fe K region for obs 4 (upper-left), 6 (upper-middle), 7 (upper-right), 8 (lower-left), and 9 (lower-middle). The dotted vertical lines indicate from left to right the rest energy of the transitions of neutral Fe, Fe xxv Kα, Fe xxvi Kα, Ni xxvii , Fe xxv Kβ, Ni xxviii, and Fe xxvi Kβ.

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