Left: ANTARES 90% confidence limits on a flavour-uniform neutrino flux (Φ_ν ≡ Φ_νe + Φ_νμ + Φ_ντ = 3Φ_νμ) from the six blazars as a function of spectral index s_ν (Eq. (1)). Right: corresponding limits on the expected number of IceCube events of blazar origin, using the exposures shown in Fig. 1 and the limiting fluxes. Since the limits from 0235−618, 0302−623, and 0308−611 are almost identical, and since no events were observed, the limits also apply to the summed flux from all three of these blazars, and hence only one line is shown, and is labelled “IC 20 TANAMI blazars”.