Evolution of the total flux, F_I, and the polarized flux, F_Q (total flux multiplied by the percent polarization), computed with LONG_POL assuming a 2D, prolate ejecta based on model r1w6b (ρ_pole/ρ_eq = 5). Epochs cover from 2.5 to 10.0 d after explosion. Both fluxes are scaled to the inferred distance of SN 1998S, with an additional scaling for the total flux (see label) to match the magnitude of the polarized flux at 6300 Å (F_Q flips sign at the last epoch). All fluxes have been rebinned at 6 Å. See the discussion in Sect. 3.