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Fig. 2.
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NICER hardness-intensity diagram starting from MJD 60181. The intensity is the 0.5–10.0 keV count rate and the hardness is the ratio of the count rate in the 5–10 keV band to that in the 0.5–2.0 keV band, with data points binned over 100 seconds. The colour scale indicates the MJD.
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