educed chi-squared values,${\overline{\chi }}^2$, for 1.3 mm observations as a function of the inclination (i) and the orientation of the projection of the magnetic axis on the plane of the sky (φ). Black isocontours show values of the difference between the observed and modeled position angles, ∆ψ, between −10° and 10° in steps of 5°. The black-filled cyan circle shows the position of the ${\overline{\chi }}^2$ minimum.