Velocity of the absorption minimum of the Fe ii λ5169 line of LSQ13fn (blue star) against the absolute magnitude in the I band, both measured at 50 days. The black circles are a sample of SNe IIP taken from Nugent et al. (2006), while the red triangles show SN 2002gd and SN 2003Z from Spiro et al. (2014), and SN 2014bc from Polshaw et al. (2015). The velocities of SN 2002gd and SN 2003Z were measured from spectra downloaded from WISeREP and extrapolated to 50 d via Eq. (2) of Nugent et al. (2006).
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