3HSP J095507.1+355101 SED. The grey points refer to archival data and, in the case of Fermi-LAT data, the time-integrated measurement up to the neutrino arrival alert. The average all-flavour neutrino flux is shown for an assumed live time of 10 yr. Coloured data points are Swift and NuSTAR measurements made around the neutrino arrival time. The black/grey γ-ray points refer to the red/grey bow ties, indicating the one-sigma uncertainty of the γ-ray measurement 250 days before the observation of IceCube-200107A and during the full mission, respectively. The best-fit fluxes are shown as solid lines. Upper panel: full hybrid SED, while lower panel: enlarged view of the optical and X-ray bands.