Fig. 3
Optical spectra of SNe 2014bc, 1999br, and 2005cs, all at approximately 50 d after explosion. The spectra have been corrected for reddening and redshift. The ⊕ symbol indicates significant telluric absorption. Insets a) and b) show zoom-ins of the Fe ii λ5169 and Na i D regions respectively. Inset c) shows a zoom-in of the higher resolution 102 d spectrum of SN 2014bc. The rest wavelengths of Fe ii λ5169, Ba ii λ5854 and the Na i λλ5890, 5896 doublet are marked by vertical red lines in the inset panels.
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