Notes. The reference JDs are the estimated times of explosion of Dessart & Hillier (2006) and Pastorello et al. (2009). The abbreviations for the data sources are H01 for Hamuy et al. (2001), P06 for Pastorello et al. (2006), D08 for Dessart et al. (2008), F14 for Faran et al. (2014), and P200 for spectra taken at the Palomar 200-inch Hale Telescope with DBSP. All spectra have been retrieved from the WISeREP archive (Yaron & Gal-Yam 2012). We use the listed time since explosions t_exp, as taken from Dessart & Hillier (2006) and Dessart et al. (2008), for calculating synthetic spectra with the emulator.