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Fig. 7


GRB 130215A/SN 2013ez: for comparison, we plot the spectra of several GRB-SNe (SN 1998bw, purple line; SN 2006aj, orange line; SN 2010bh, black line) and one SN Ic-BL (SN 1997ef, green line) that was not associated with a GRB, each at a similar post-explosion date as SN 2013ez. All times are rest-frame and the spectra have been scaled and shifted for clarity. It is seen that the absorption features in the spectrum of 2013ez are not as broad as those of the comparison SNe.

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