Table A.2.
Spectroscopic properties of all 124 SNe in the initial sample, including Si IIλ6355 velocity and pseudo-equivalent widths of key features (Si IIλ6355, Si IIλ5972, Mg IIλ4000, O Iλ7774, and Ca II NIR), together with the spectral phase and spectroscopic classification of each SN.
| ZTF Name | IAU Name | Subtype | Phase (days) | v (Si IIλ6355) (103 km s−1) | pEW (Si IIλ6355) (Å) | pEW (Si IIλ5972) (Å) | pEW (Mg IIλ4000) (Å) | pEW (O Iλ7774) (Å) | pEW (Ca II NIR) (Å) |
|---|---|---|---|---|---|---|---|---|---|
| ZTF18aahfgyz | 2018ast | 91bg-like ‘Gold’ | 2.102 | 9.539 ± 0.443 | 81.183 ± 3.824 | 46.15 ± 3.612 | 276.189 ± 4.284 | 100.153 ± 2.74 | 273.212 ± 2.809 |
| ZTF18aahjaxz | 2018avg | 91bg-like ‘Gold’ | -0.157 | 9.965 ± 0.436 | 80.674 ± 2.976 | 36.89 ± 3.246 | 131.721 ± 3.93 | 96.604 ± 1.557 | 371.657 ± 1.7 |
| ZTF18aaimxdx | 2018bay | 91bg-like ‘Gold’ | 1.693 | 9.022 ± 0.375 | 107.956 ± 3.37 | 41.864 ± 3.136 | 255.711 ± 6.676 | 132.354 ± 2.018 | 300.368 ± 2.391 |
| ZTF18aarcypa | 2018bil | 91bg-like ‘Gold’ | 1.490 | 9.548 ± 0.7 | 75.937 ± 3.755 | 22.192 ± 3.777 | ⋯ | 43.373 ± 2.018 | 74.142 ± 1.676 |
| ZTF18abdmgab | 2018lph | 91bg-like ‘Gold’ | 0.437 | 10.279 ± 0.331 | 135.307 ± 2.964 | 46.826 ± 2.818 | 242.061 ± 6.778 | 133.78 ± 1.311 | 379.614 ± 1.857 |
| ZTF18abltdfj | 2018eyi | 91bg-like ‘Gold’ | 0.970 | 8.804 ± 0.69 | 92.554 ± 4.056 | 32.483 ± 4.112 | 270.29 ± 2.643 | 121.536 ± 2.625 | 294.415 ± 2.559 |
| ZTF18abnzocn | 2018foc | 91bg-like ‘Gold’ | 1.199 | 9.311 ± 0.47 | 79.993 ± 3.679 | 17.414 ± 4.062 | 253.634 ± 4.041 | 78.078 ± 2.225 | 232.021 ± 2.161 |
| ZTF18abtnbys | ⋯ | 91bg-like ‘Gold’ | 0.199 | 9.440 ± 0.523 | 113.54 ± 3.726 | 47.809 ± 3.596 | 233.824 ± 4.176 | 141.216 ± 2.191 | 354.292 ± 2.203 |
| ZTF18acrcetn | 2018jag | 91bg-like ‘Gold’ | 0.828 | 11.173 ± 0.347 | 151.745 ± 8.232 | 76.821 ± 7.579 | ⋯ | 169.191 ± 7.408 | 413.613 ± 29.916 |
| ZTF18acybqhe | 2018efm | 91bg-like ‘Gold’ | 4.241 | 9.261 ± 0.372 | 102.062 ± 2.514 | 45.82 ± 2.718 | 162.441 ± 5.224 | 137.024 ± 1.213 | 221.728 ± 1.329 |
| ZTF18adathpb | 2018ldz | 91bg-like ‘Gold’ | 1.814 | 9.04 ± 1.163 | 82.778 ± 3.638 | 39.774 ± 4.085 | 194.826 ± 3.061 | 101.483 ± 2.716 | 354.943 ± 2.908 |
| ZTF19aaafica | 2019be | 91bg-like ‘Gold’ | -4.975 | 8.705 ± 0.981 | 71.707 ± 1.955 | 38.439 ± 2.001 | 292.39 ± 2.869 | 87.541 ± 1.186 | ⋯ |
| ZTF19aaaonuk | 2019cp | 91bg-like ‘Gold’ | 4.259 | 10.432 ± 0.811 | 154.165 ± 2.946 | 51.24 ± 3.116 | 285.817 ± 3.57 | 146.902 ± 1.346 | 355.419 ± 1.98 |
| ZTF19aaejslw | 2019afa | 91bg-like ‘Gold’ | 0.249 | 9.988 ± 0.902 | 118.99 ± 2.002 | 58.091 ± 2.162 | 164.258 ± 4.042 | 108.981 ± 0.881 | 322.025 ± 0.991 |
| ZTF19aaeopqn | 2019abk | 91bg-like ‘Gold’ | -4.782 | 10.617 ± 0.736 | 122.27 ± 1.923 | 43.952 ± 2.148 | 247.085 ± 3.616 | 191.199 ± 0.951 | 412.224 ± 0.86 |
| ⋮ | ⋮ | ⋮ | ⋮ | ⋮ | ⋮ | ⋮ | ⋮ | ⋮ | ⋮ |
Notes. (1) It refers to the source, from which the values of the time of maximum light are obtained.
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