Left panels: CCDs extracted from the six typical observations. Insets show HID1s. Rates are given in per rate band with all the opened PCUs, 2−60 keV, and background subtracted. Middle panels: PDS. Shaded areas mark the frequency bands around νQPO and νmax. Right panels: time lags as a function of energy for various frequency bands vs. the lowest energy interval (2.06−4.09 keV). Different symbols correspond to different frequency bands.
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