Open Access
Table 1
Main characteristics of the MISTRAL instrument.
| Wavelength range | 4100-8200 Å (blue setting) and 5800–9950 Å (red setting) |
| Spectral resolution | R ~ 700 at 6000 Å, see also Appendix C |
| Fixed Slit Width | 1.9 arcsec |
| Optical efficiency (Telescope + spectrograph) | ~0.22 at 6000 Å (mean OHP seeing of 2.5 arcsec and slit of 2 arcsec) |
| Imaging field of view | 5.1 arcmin full light (9 arcmin in total) |
| Filter wheel | ɡ′ , r′ , l′ , z′ , Y, Hα, OIII, SII, Hß, red and blue order separation filters |
| CCD | Andor iKon-L 936, 27.6 × 27.6 mm / 2048 × 2048 pxs of 13.5 µ, Deep Depletion CCD |
| Spectral Calibration lamps | Ar/Hg/Xe lamps for wavelength calibration, Tungsten for Flat Fields |
| Sampling | 0.48 arcsec for 13.5 microns pixels |
| Grism | Blue: two prisms at 19.8° with VPH at 600 tr/mm at 6000 Å d = 50 mm |
| Red: two prisms at 25.6° with VPH at 600 tr/mm at 9000 Å d = 50 mm | |
| Camera lenses | Blue: Nikon AF-S 100 mm F/1.4 |
| Red: XENON-EMERALD 2.9/100-L |
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