Absolute magnitude (rest frame) light curves from ∼1800 to 18500 Å, including the Liverpool Telescope SDSS filters as triangles, the Swift UVOT filters as squares and the ZTF filters as circles. The black triangles at the top indicate the phases of available spectra. Phase = 0 (at peak ZTF g-band) is estimated in Sect. 3.2. The light curves in the different bands were shifted for illustration purposes.