Top: Combined Spectral Energy Distribution (SED) for the quasar PKS 0446+11. Bottom-left: the off flare period. Bottom-right: the on flare period. The total photon spectrum is shown as a thick red curve. The pink dashed line represents the neutrino spectrum (all flavors). The orange curve gives the sum of synchrotron and Compton emissions from injected electrons, while the black one is the synchrotron emission from injected protons. The green and blue curves present the secondary emission from e⁺e⁻ pairs generated via the Bethe–Heitler process and γγ annihilation, respectively. See the text for discussion of the observational data points.