Results of timing analysis. The power continuum is integrated from 0.1 to 10 Hz. Strong QPOs continue even into the possible thermally dominated regime, then disappear around MJD 54850, reappearing when the source again hardens. Although we expect a return of a QPO signal late in the outburst (after MJD 54950), the overall count rate is too low for a QPO peak to be detected. The vertical lines are the same as in Figure 1.