Energy-resolved light curves (top panels) and HRs (Eq. 1) between the 8–10 and 3–6 keV bands (bottom panels), with a time resolution of the respective pulse period, for the three observations. The width of each column is proportional to the duration of the corresponding observation. The light curves are plotted on a logarithmic scale for clarity. The colors represent different energy bands following the legend in the plot. Gray areas mark intervals of bright flares excluded for time-resolved analysis (see Sect. 3.1 and Table 3).