Angular distribution of the specific intensity for a model with T_eff = 4500 K, log g = 4.5, [M/H] = 0.0, and V_ξ = 2 km s^¯1 for the TESS passband. The red line represents the specific intensity distribution and the red cross indicates µ_cri,1. The green line denotes the fitting adopting the power-2 law, while the green cross indicates the fitting at µ_cri,1. The blue line denotes the four-parameter law approach and the blue cross indicates the fitting at µ_cri,1. This plot is for case M1, and the specific intensity profiles have not been re-scaled.