Kinematic modelling of the GC system of FCC 083. Left: LOS velocity map of FCC 083 with GC velocities overplotted as circles. We used the same colourbar scaling for the stellar light bins and the GCs. The black contours are isophotes to guide the eye. Right: posterior distributions for V_GCS and σ_GCS of the MCMC fit to the GCS of FCC 083 (Eq. (3)). For θ₀, we used a Gaussian prior with θ₀ = 142 ± 1° (Iodice et al. 2019a).