(a) Comparison of the best single parameter HG_pol fit model for fixed i = 75° and measured relative quadrant polarization parameters for HR 4796A. (b) Deviations from the best-fitting HG_pol (i = 75°, g = 0.65) for the measured values, for the best fits for slightly different disk inclinations HG_pol (i = 73°, g = 0.60) and HG_pol(i = 77°, g = 0.71) and for the HG_pol fit from Milli et al. (2019) (green dashed line). (c) HG_pol phase functions and the directly extracted phase function f_ϕ(θ) (dotted black line) with corresponding uncertainty range (grey shaded area) from Milli et al. (2019). (d) HG intensity phase functions. The measured quadrant values and the different fit curves are identified in panel b.