Analysis via BCP of the XMM-Newton PN light curves in the 0.3–8.0 keV bandpass. Top panel: light curve (gray dots) with the posterior mean (solid line). The scale of the y-axis is logarithmic and with the same range of values across the 3 panels for ease of comparison. Bottom panel: posterior probability at each point. We indicated the probabilities P >  0.3 with red dots; the horizontal dotted lines show the levels at significance P = 0.3 and P = 0.1, respectively.