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Table 1.
Instrumental and observational parameters.
| Parameter | Value |
|---|---|
| Telescope | 2.1 m (OAN-SPM) |
| Instrument | PUMA |
| Scanning F–P interferometer | ET-50 (Queensgate) |
| Interference order | 330 at 6562.78 Å |
| Free spectral range, FSR (Å/km s−1) | 19.95/912.0 |
| Interferometer finesse, ℱ | 24 |
| Number of scanning channels | 48 |
| Spectral sampling at Hα (Å/km s−1) | 0.42/19.0 |
| Spectral resolution, R | 6720/0.83 |
| Spectral element (Å/km s−1) | 0.83/38.5 |
| Interference filter (Å) | 6720 |
| FWHM of filter (Å) | 20 |
| Detector | Tektronix CCD |
| Detector size (px × px) | 1024 × 1024 |
| Image scale (″ per px) | 0.58 |
| Electronic binning | 2 |
| Image scale after binning (″ per px) | 1.16 |
| Mean seeing during observations (″) | 1.5 |
| Total exposure time (min) | 96 |
| Total exposure time per cube (min) | 48 |
| Number of science cubes | 2 |
| Exposure time per channel (s) | 60 |
| Exposure time for direct image (s) | 120 |
| Calibration line (Å) | 6717 (Ne lamp) |
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