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Fig. 5.

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Comparison of pulse profile and hardness ratio between Obs. I and II. Top: NuSTAR broadband pulse profile for Obs. I (dark blue) and Obs. II (light blue). The pulse profiles are normalized to average zero and units of standard deviation. Dotted lines mark the phase intervals selected for pulse-phase-resolved spectroscopy. Bottom: Hardness ratio of the 3–7 keV and 7–14 keV band, defined as (H − S)/(H + S). The phase definition is the same as in Paper I.

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