Limiting, T_b,lim (top row of datapoints) and minimum, T_b,min (bottom row of datapoints), brightness temperature estimated directly from visibility data for 3C 345 and corrected for an assumed ellipticity of the emitting region, with ϵ = 0.5 (based on MOJAVE model fitting reported in Kovalev et al.2005). and ψ_jet = −104°. The limiting brightness temperature of 4.8 × 10¹¹ K, obtained from the visibilities at the longest baselines (B> 600 Mλ), agrees well with the estimate based on model fitting the source structure.