Surface brightness expressed in mag/arcsec² as measured for the model with parameters i = 88°, r₀ = 110 AU, α_out = −5, α_in = 5, g = 0.50 (top), corresponding to the H band and for the parameters i = 88°, r₀ = 110 AU, α_out = −5, α_in = 2, g = 0.50, corresponding to the Ks band. Red and blue lines stand for the NE and SW sides, respectively. Dotted lines show the disk intensity dispersion at 1σ within the slit window of 0.25′′. Dashed lines correspond to the fitted power-law profile next to which the slopes are indicated.