2D histograms of the pitch angle (x-axis, from 0° to 180°; one tick equals 45°) and the magnetic field azimuthal angle (y-axis, from −180° to 180°). The histograms are analogously structured and normalised as in Fig. C.1, except that only the row for 0.95 ≤ ϖ_inj, P ≤ 1.05 is shown, the observations are restricted to the region of the focusing cone, and each column refers to observations associated with a different SW velocity v_SW.