Table 1
Sources of spectroscopic observations.
| Observatory | Code | Tel. aperture + equipment | Aperture | Focus |
| 1 | 2 | 3 | 4 | 5 |
|
|
||||
| SAO(Russia) | L(N) | 6 m + Long slit | 2.0 × 6.0 | Nasmith |
| SAO(Russia) | L(U) | 6 m + UAGS | 2.0 × 6.0 | Prime |
| SAO(Russia) | L(Sc) | 6 m + Scorpio | 1.0 × 6.07 | Prime |
| Gullermo Haro (Mexico) | GHO | 2.1 m + B&C | 2.5 × 6.0 | Cassegrain |
| San Pedro Martir (Mexico) | SPM | 2.1 m + B&C | 2.5 × 6.0 | Cassegrain |
| SAO(Russia) | Z2K | 1 m + GAD | 4.0 × 9.45 | Cassegrain |
| Calar Alto(Spain) | CA1 | 3.5 m + B&C/TWIN | (1.5–2.1) × 3.5 | Cassegrain |
| Calar Alto(Spain) | CA2 | 2.2 m + B&C | 2.0 × 3.5 | Cassegrain |
Notes. Column (1): observatory. Column (2): code assigned to each combination of telescope + equipment used throughout this paper. Column (3): telescope aperture and spectrograph. Column (4): projected spectrograph entrance apertures (slit width × slit length in arcsec). Column (5): focus of the telescope.
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