PDSs in the 0.3–10 keV band of the LP observations A (left), B (centre), C (right). Panel a: PDS with the components used for the fit. Panel b: residuals of the model without the second Lorentzian. Panel c: residuals of the final model with two Lorentzians. For each observation, we combined data from both PN and MOS cameras. The PDSs are computed using the Leahy normalization. The model we used to fit the PDSs is described by Equation (1).