Light curves in the γ-ray (top), X-ray (middle), and UV/optical (bottom) regimes from 2019 September 27 until 2019 November 19. The Fermi/LAT light curve shows the daily binned flux of the bins with TS ≥ 1. LAT light curve bins with TS < 1 are represented as 2σ upper limit arrows. All errors represent the 1σ uncertainties. For NuSTAR, the flux is interpolated down to 0.5 keV. The dark-grey shadowed region marks the time range that is used for the flare SED, while the pre- and post-flare time ranges are shown in light grey.