V-band AA Tau light-curve spanning 26 years is shown on the top panel. Gray circles refer to Mt Maidanak measurements (Grankin et al. 2007) while dark circles are new measurements from CrAO. The V = 14 mag brightness level is shown as dashed line for reference. The bottom panel shows a zoom on the two last observing seasons (2011–2012). The two leftmost red arrows in late-2011 are the time the Calar Alto low-resolution spectra were obtained, and the red photometric point below the second arrow is the Calar Alto photometric measurement. The rightmost blue arrow in early 2012 corresponds to the time the ESO/XSHOOTER spectrum was obtained.
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