Notes. The first column lists the dimensionality of the simulation. The 1D spherically symmetric non-LTE time-dependent simulations with CMFGEN are used as initial conditions for the 2D axially symmetric polarized radiative transfer simulations with LONG_POL. The second column lists the model name. The following columns provide some characteristics of each simulation. For the 1D simulations, we list the ejecta kinetic energy and the total mass of ⁵⁶Ni (it may be present in the core and in an external shell; see Fig. 1). For the 2D simulations, we list the continuum polarization at 50 and 300 days, as well as the maximum value it attained. We also indicate whether the continuum polarization exhibits a sign flip during its evolution from 15 to 300 days. The evolution of the quantity −Q_cont, defined as −100F_Q/F_I, is shown in Fig. B.4. We show the average of this quantity in the spectral region from 6900 to 7200 Å. The full description of these quantities is given in the Appendix A. All 2D simulations adopt mirror symmetry with respect to the equatorial plane.