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Table 2

Statistics of correlations between Fe ii 5018 Å pEWs and SN II light-curve and spectral parameters. In the first column the SN II parameter is listed.

LC/spec parameter N SNe II r p

M max 77 0.64 ± 0.09 2.2 × 10-4%
Mend 79 0.47 ± 0.11 0.11%
Mtail 29 0.48 ± 0.14 7.1%
s1 20 –0.48 ± 0.15 16%
s2 77 –0.41 ± 0.13 1.4%
s3 24 –0.50 ± 0.24 22%
56Ni 13 –0.46 ± 0.23 45%
56Ni* 36 –0.54 ± 0.10 0.72%
Pd 17 0.26 ± 0.31 100%
OPTd 24 0.12 ± 0.14 100%
a/e 43 0.60 ± 0.10 0.064%
Hαvel 24 –0.61 ± 0.09 0.92%

Notes. Mmax is the maximum V-band absolute magnitude; Mend the magnitude at the end of the “plateau”; Mtail the magnitude at the start of the radioactive tail; s1 the initial decline from maximum; s2 the decline rate during the “plateau”; s3 the decline rate of the radioactive tail; 56Ni the synthesised nickel mass, with 56Ni* including upper limit calculations; Pd the duration from the inflection point of s1 and s2 to the end of the “plateau”; OPTd the duration from explosion to the end of the “plateau”; a/e the ratio of the pEW of absorption to emission of Hα; and Hαvel the FWHM velocity of Hα. This is followed by the number of SNe II in Col. 2. The Pearson’s mean r value is then given together with the standard deviation. Finally in Col. 4 the chance probability of finding a correlation is listed.

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