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Table 1.
Sets of spectra analyzed in this paper.
| Obs. | Instrument | R | N | S/N | Dates |
|---|---|---|---|---|---|
| RNAO | 2 m/Coudé | 15 000 | 49 | 95 | 4811–6964 |
| OAN | 2.12 m/Echelle | 18 000 | 30 | 68 | 5580–5588 |
| GAO | 0.5 m/Echelle | 18 000 | 8 | 54 | 6203–6206 |
| APO | 3.5 m/ARCES | 30 000 | 3 | 53 | 6227,6616 |
| KAO | 1.21 m/Echelle | 15 000 | 27 | 41 | 7779–8221 |
| AIO | 2 m/OES | 50 000 | 17 | 35 | 8925–9294 |
Notes. Obs. denotes the observatory (cf. the text), instrument denotes the telescope or spectrograph, R the resolving power, N the number of exposures, S/N is the signal-to-noise ratio, and dates are given as JD−2450000.
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