As in Fig. 3 but for three different models of E_max characterized by smooth variations with obliquity angle. The azimuth is measured counterclockwise from the “north” of the remnant. The shock is parallel around 90° and 270° and perpendicular around 180° and 360°. In model A (solid line), the contrast of E_max is , in model B (dotted) , and in model C (dashed) is  <1 on the side of the remnant with the strongest ISMF strength and  >1 on the side with the lowest field strength (see text).