ZTSh: ESPL
Echelle spectrograph in the coude focus (ESPL) (Echelle Spectrograph Pronik Lagutin)
Characteristics of the spectrograph
| Collimator | f = 6000 mm |
| Camera | f = 1080 mm |
| Echelle | 420×200 mm, 37.5 Grooves/mm, angle 63.5° |
| Prism | 34° |
| Grating | 150 Grooves/mm |
| Dispersion near Hα line | 1.39 Å/mm ≈ 0.019 Å/pixel |
| Spectral resolution with the entrance slit width of 0″.5 | R ≈ 51000 |
| Scale | 1″ = 0.083 mm ≈ 6 pixel |
| Exposure for stars of 10m (slit width of 0″.5) | 30 minutes (S/N ≈ 50 near Hα line) |
Detector: CCD camera Andor iKon-L 936
Characteristics
| QE | 98% Max. at λ5500 Å |
| Geometry | 2048×2048 pixels (27.6×27.6 mm), 13.5 μm |
| Well Depth | 100,000 e- |
| Dynamic resolution | 16 bits, 100 kHz |
| Cooling | up to -100°C |
A detailed description of the spectrograph is to be found in the paper: Lagutin et al., 2019, Bulletin of CrAO, V. 115, P. 53-62 (in russian)
