Red continuum polarization of SN 2011fe (−6d) compared to SN 1999by (0d) and SN 2005ke (−8/−7d). SN 2011fe continuum polarization (solid blue line) roughly matches SN 2005ke (dot-dashed red line; Patat et al. 2012) and shows a similar increase with wavelength as SN 1999by (dashed green line; Howell et al. 2001). Errors of the SN 2011fe data are shown in the lower panel.