Phase-folded light curve of B, V, R, I band photometry (bottom to top). Colours are as indicated in the legend. Additionally, we show the HOYS U band data in magenta. For clearer display of the brightness maximum we repeat the data and add 1.5 mag in each band except the I band. In the V band we mark with black diamonds the HOYS data taken at the time of the PENELLOPE observations, while the purple square represents HOYS photometry taken near the X-Shooter no. 2 observation.