Examination of the timing relationship between shocks and accretion. Left: Shock light curve (thick purple) and accretion rate (thin orange), each normalized by their mean value. Right: Cross-correlation of the shock and accretion ‘light curves.’ The cross-correlation is itself periodic due to both signals being periodic, and peaks at a lag of 0.43 t_bin. Since the two signals have a period of t_bin, this affirms that they are almost fully out of phase with one another, as is apparent by eye in the left panel.