X-ray polarization degree, Π_X = Π_pp = 2.3 (top panels) and optical polarization degree, Π_O = Π_pe = 4.6 (bottom panels) as a function of the viewing angle, θ_obs, which is expressed in radians. In the left panels the proper number density is assumed to be constant, whereas in the right panels the magnetization is assumed to be constant. The width of the proton emission region is assumed to be Δz = 3z₀.