Top panel: TESS light curve from Fig. 5 after subtracting out the low-frequency variations. It is split into four sections, labeled “a”, “b”, “c”, and “d”, corresponding to the pre-outburst disk-less phase (a), the first outburst (b), the second larger outburst (c), and the post-outburst phase (d). The corresponding frequency spectra from these sections are shown in the lower panels (in clockwise order), where the black curve is computed from sections a and d.