Comparison of T_b,lim (circular Gaussian approximation) and T_b,mod estimates obtained from the MOJAVE data (open circles). Gray circles illustrate the effect of correcting T_b,lim for the putative elongation of the core region. The dashed line marks the one-to-one correspondence between the two estimates. For each object, the T_b,lim is estimated from MOJAVE data at R_uv ≥ 0.99 B_max to restrict the visibility information to the most compact structures. The resulting T_b,lim are on average 4.6 times higher than T_b,mod. The residual logarithmic distribution of the T_b,lim/T_b,mod ratio (inset) can be approximated by the Gaussian PDF with μ = 0.66 and σ = 0.57. At T_b,mod ≲ 10¹⁰ K the T_b,lim may be biased by large-scale structure contributions in strongly jet-dominated objects.