Open Access
Table 1.
Breakdown of the number of spectra/SNe Ia remaining after each cut to reach the final sample of 329 spectra ready for fitting.
| Cut | Spectra | SNe |
|---|---|---|
| Initial cuts | ||
| ZTF Cosmo DR2 | 5028 | 3585 |
| Light curve quality cuts | 4572 | 3280 |
| Phase < 0 d | 2362 | 1801 |
| Si IIλ6355 wavelength coverage | 2349 | 1793 |
| Visible Si IIλ6355 | 1930 | 1557 |
| Spectral quality cuts | ||
| Dispersion ≤ 10 Å/pix | 660 | 605 |
| S/N ≥ 8 | 329 | 307 |
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