Fig. 9.
Top: photospheric spectra of SN 2019bkc compared with the Ca-rich transients SN 2012hn, SN 2005E, iPTF16hgs, SN 2010et, and “ultra-stripped SN” iPTF14gqr. The spectra at this phase are heterogeneous and SN 2019bkc is most similar to iPTF14gqr. Lower: nebular phase spectra of SN 2019bkc compared with the same transients plus PTF12bho. Ca II and [Ca II] lines are denoted in red solid and dashed lines respectively. To match the +19.6 d spectrum of SN 2019bkc to that of SN 2005E requires a velocity shift of ∼10 000 km s−1 (grey).
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