HQ Tau’s V-band light curve. CrAO measurements are shown as filled grey circles, the K2 light curve as a continuous line, AAVSO measurements as filled triangles, and the ASAS-SN rescaled g- and V-band datasets as crosses and open circles, respectively. The upper panel shows the light curve over 2 observing seasons while the lower one displays the photometric variability of the source around the CFHT/ESPaDOnS observations.