Fig. 8.
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X3 PN+MOS light curve. The top panel show the soft (0.3–1 keV) band, the middle panel the hard (1–10 keV) band, and the bottom panel the hardness ratio of the hard count rate to the soft count rate. We do not show the points in the first 40 ks since the hardness ratio in this range is dominated by noise. The bin time of the background-subtracted light curves is 1000 s.
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