Fig. 3.

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Mean template spectra for the Type Ib SE SN subtype at epochs of −7 d, 0 d, +7 d, +14 d, and +21 d. The number of spectra used to construct each template is indicated within parenthesis below the corresponding epoch. Each numerically indicated spectral feature is labeled with its parent ion(s) as determined from SYNAPPS fits. Thin gray lines indicate the 1-σ error spectrum.
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