Fig. 12.

Angle averaged spectrum of Model M2a at 15 days after explosion (∼2 days before peak) compared to the spectra of SN 2016jhr (Jiang et al. 2017) 2 days before peak, SN 2018byg (De et al. 2019) 2 days before peak, and SN 2011fe (Nugent et al. 2011) 1.8 days before peak. SN 2016jhr and SN 2018byg have both been suggested to have been helium detonations. The spectra for SN 2016jhr and SN 2018byg have been de-reddened and redshift corrected, and are scaled to match the brightness of Model M2a.
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