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Table 2

Mean spectro-photometric properties of the SNLS – VLT SN Ia +SN Ia⋆ subsamples.

VLT (first 3 years) VLT (final 2 years) VLT (all 5 years)
122 SNe Ia + SNe Ia ⋆ 67 SNe Ia + SNe Ia ⋆ 189 SNe Ia + SNe Ia ⋆
137 spectra 69 spectra 206 spectra
z⟩ (σz) 0.64 ± 0.02 (0.21) 0.62 ± 0.02 (0.19) 0.63 ± 0.01 (0.20)
⟨Φ⟩ (σΦ) 2.9 ± 0.5 (5.6) 1.4 ± 0.6 (4.9) 2.4 ± 0.4 (5.4)
0.24 ± 0.02 (0.28) 0.44 ± 0.03 (0.25) 0.31 ± 0.02 (0.29)
SN⟩ (σSN) 4.4 ± 0.4 (4.6) 4.6 ± 0.7 (5.9) 4.5 ± 0.4 (5.1)
23.621 ± 0.080 (0.832) 23.511 ± 0.110 (0.890) 23.582 ± 0.062 (0.852)
24.005 ± 0.037 (0.407) 23.969 ± 0.040 (0.326) 23.992 ± 0.028 (0.380)
c⟩ (σc) − 0.016 ± 0.011 (0.121) − 0.023 ± 0.013 (0.109) − 0.019 ± 0.009 (0.117)
0.390 ± 0.088 (0.968) 0.180 ± 0.099 (0.801) 0.315 ± 0.067 (0.916)
s⟩ (σs) 1.018 ± 0.008 (0.087) 0.998 ± 0.009 (0.072) 1.011 ± 0.006 (0.083)

Notes. <S/N> are computed in 5 Å bins. Errors are 1σ on the mean (dispersion is given in parentheses). The spectra of SNe Ia identified as SN Iapec (two SN in the first three years sample and one in the final two years sample) have been discarded.

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