Light curve and WWZ power of EPIC camera of the XMM-Newton ObsID 0205590301. The upper panel shows the light curve in the range of 0.2–10.0 keV. The upper panel shows the light curve of the EPIC camera of the ObsID 0205590301 in the range of 0.2–10.0 keV. The lower-left panel displays a two-dimensional plot of dynamic WWZ power in time–frequency space. The lower-right panel displays average WWZ power (black) and LSP value (red) curves. The blue lines represent the confidence levels of 3.0, 3.5, and 4.0 σ, respectively. The orange dotted line represents the 4.0 σ confidence level calculated using the method proposed by Baluev (2008).