Fig. 7.

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Power density spectra with the NICER (top panel) and Insight-HXMT (bottom panel) data in MJD 59280. From the top to the bottom is the PDS with 0.5–1 keV, 1–1.5 keV, 1.5–2 keV, 2–4 keV, 4–8 keV, 10–30 keV, 28–100 keV data, respectively. The PDSs have been shifted vertically with different factors to show the comparison between the different photon energies.
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