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Fig. 5
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Unfolded best-fit TBabs[deltadisk + nthComp] model for the high-frequency (7− 30 Hz) covariance spectrum of combined observations O104-O105. The residuals observed at ~1–2 keV are likely due to NICER’s calibration systematics (NICER’s effective area shows features due to O, Si, and Au at 0.5, 1.8, and 2.2 keV).
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