Fig. 6.
+24 d spectrum (16 d after r-band maximum, shown in gray) compared to “best-match” templates obtained with the SNID (Type Ic SN 2004aw and Ic-BL SN 1998bw) and GELATO (Ic SN 2003jd) classification tools. Spectra of SNe 2004aw and 1998bw are the “flattened” templates included in the SNID database. Phases relative to maximum light of each object are reported in the legend. The spectral continua of SNe 2018ijp and 2003jd (not included in the SNID template database) were estimated through spline functions and subtracted. The spectrum of SN 2018ijp has been smoothed in order to highlight its broad features.
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