Top panel: AAVSO V light curve together with the epoch of the UVES observations (blue lines), the ARAS high-resolution un-calibrated and low-resolution flux calibrated spectra (green dotted and solidlines, respectively), the LISA and HEROS observations (red lines), and the FIES spectra (cyan lines). Middle panel: AAVSO B, R, and I light curves together with Swift UVOT UVW1 (λ_c =2600 Å), UVM2 (λ_c=2246 Å), and UVW2 (λ_c1928 Å). Bottom panel: color light curve: (B–V), (V –R), and (V –I). Error bars ≥0.2 mag in the color light curves were arbitrarily set whenever either the V or the paired broadband photometry did not have an associated error bar. Colors were computed every time the V and broadband filter were taken within 3 h observations.