High-cadence, U-band light curves of DQ Tau highlighting the rise and decline over the course of days near periastron passage. Vertical dashed lines mark periastron passage. Horizontal dotted lines mark the quiescent brightness. Periastron number in relation to Figure 1 is provided in the top right of each panel along with the source of the data. LCOGT observations are crosses. The light gray box in the top panel marks the region plotted in Figures 4 and 5.