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Table 1
Summary of observations.
| Star | Instrument | Total Exp. time | Number of spectra | Typical S/N per spectrum | |
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|
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| HD 108 | NARVAL | 34h20min | 37 | 150–500 | |
| HD 148937 | ESPADONS | 4h00min | 6 | 200–700 | |
| HD 191612 | ESPADONS | 2h40min | 8 | 100–350 | |
| Θ1 Ori C | NARVAL | 53min | 2 | 500–1300 | |
| ζ Ori A | NARVAL | 13h52min | 336 | 1000–1400 | |
| HD 57682 | ESPADONS | 3h4min | 5 | 400–800 | |
| τ Sco | ESPADONS | 13min | 5 | 600–1200 | |
Notes. The complete journal of observations is given in Appendix A.1.
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