Table 7
Statistics of the local metallicity distributions of SNe discovered in untargeted and targeted searches.
| Untargeted | Targeted | ||||||||||
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| Type | Mean | σ | σ m | Median | N SN | Mean | σ | σ m | Median | N SN | |
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| Iaa | 8.455 | 0.129 | 0.010 | 8.503 | 171 | 8.520 | 0.083 | 0.010 | 8.543 | 70 | |
| Ic | 8.458 | 0.124 | 0.026 | 8.515 | 22 | 8.495 | 0.112 | 0.020 | 8.511 | 30 | |
| II | 8.447 | 0.126 | 0.021 | 8.511 | 35 | 8.450 | 0.127 | 0.013 | 8.475 | 92 | |
| IIb | 8.367 | 0.149 | 0.053 | 8.302 | 8 | 8.415 | 0.101 | 0.034 | 8.404 | 9 | |
| Ib | 8.355 | 0.130 | 0.031 | 8.388 | 18 | 8.461 | 0.102 | 0.019 | 8.468 | 28 | |
| Ic-bl | 8.274 | 0.151 | 0.048 | 8.261 | 10 | 8.436 | 0.123 | 0.055 | 8.481 | 5 | |
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| Ib/IIb | 8.359 | 0.133 | 0.026 | 8.344 | 26 | 8.450 | 0.100 | 0.016 | 8.448 | 39 | |
| Ibc | 8.418 | 0.133 | 0.020 | 8.428 | 44 | 8.485 | 0.107 | 0.014 | 8.511 | 62 | |
| IIn | – | 8.427 | 0.150 | 0.025 | 8.475 | 35 | |||||
| CC | 8.421 | 0.137 | 0.015 | 8.488 | 88 | 8.455 | 0.126 | 0.009 | 8.481 | 196 | |
Notes.For each SN subtype are shown the mean, the standard deviation σ, the standard deviation of the mean σm, the median, and the number of SNe.
The metallicities of the untargeted SN Ia sample come from Pan et al. (2014) and Childress et al. (2013). These measurements correspond to the total galaxy metallicity and have been corrected by +0.028 dex to account for the bias. See text for details.
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