Component brightness temperatures against radial separation from the VLBI core (Q0), representing the emission intensity gradient along the jet. Points with arrows are 1σ upper limits. Two lines are fitted to the data to determine the power-law indices ϵ () from the data, the fit from 0.1 to 0.3 mas yields ϵ₁ = 0.95 ± 0.69 and 0.3–0.65 mas yields ϵ₂ = 4.11 ± 0.85.