Left panel: light curve in V-band of the unresolved RW Aur system from the AAVSO database. The solid vertical lines show the dates when the UVES and X-shooter (black) spectra were taken (colour legend for UVES spectra is in Table 1). The dashed vertical lines show the dates of the four optical spectra by Chou et al. (2013), which overlap on the used scale. The brown and grey dashed-dotted lines show the dates of the two UV HST spectra by France et al. (2012, 2014, respectively). Right panel: same as in left panel, zoomed during the second dimming event. Data in both panels are from Kafka (2016).