Azimuthal profiles of the maximum energy E_max computed in run Grad-BZ-g1 (solid line) and Grad-BX-g1 (dashed line) when the aspect angle is φ_B = 90° and the gradient of magnetic field strength lies in the plane of the sky (φ_∇B = 0° in run Grad-BZ-g1 and φ_∇B = 90° in run Grad-BX-g1). The shock is parallel around 90° and 270° and perpendicular around 180° and 360°. In both models, the contrast .