Top: mass accretion rate (left axis) from LCOGT observations phase-folded about the orbital period. The right axis displays the corresponding accretion luminosity. Middle: Lomb–Scargle periodogram of all of the above data. Bottom: Lomb–Scargle periodogram of the above data excluding the two encircled periastron points. In both periodograms the horizontal red line marks the 99% false-alarm probability and the vertical dashed line is the orbital period determined from radial velocity.