Poloidal magnetic field lines for different magnetisations, μ. For each solution we show only one field line anchored at 6 R_g (R_g is the gravitational radius). The solid black line indicates the LOS at an inclination of i = 21° (θ = 69°). Inset shows a zoomed in view of the LOS crossing the magnetic field lines with different magnetisations. We see that the same LOS cuts the different field lines at different distances, due to the different geometry of the magnetic field lines. Please note that the axes of the inset are non-logarithmic.