SED of 3HSP J095507.9+355101 using data from Giommi et al. (2020). Black symbols indicate observations taken on January 11, 2020 (i.e. soon after the arrival of the neutrino alert). Magenta symbols show the time-integrated Fermi-LAT data over a period of 250 days prior to the neutrino alert. SSC spectra computed for a random sample of 100 points from the posterior distributions are overplotted (solid orange lines). For comparison, the SSC model from Petropoulou et al. (2020) is also shown (dashed blue line). Photon attenuation by the extragalactic background light (EBL) is not taken into account.