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Table 1
VISTA: main system parameters.
| Parameter | Value |
|
|
|
| Site | Paranal Observatory, Chile |
| Primary mirror diameter | 4.10 m |
| Secondary mirror diameter | 1.241 m |
| Focus | Cassegrain only |
| System focal length (with IR corrector) | 12.072 m |
| M1–M2 spacing | 2725.7 mm |
| Mount type | Alt-azimuth |
| Moving mass | 90 tonnes |
| VIRCAM wavelength range | 0.8−2.3 μm |
| Field of view (VIRCAM) | 1.65 degree (diameter) |
| Field on IR pixels | 0.6 deg2 |
| Mean pixel scale | 0.339 arcsec |
| VIRCAM science detectors | Sixteen Raytheon-VIRGO HgCdTe, 20482 format |
| VIRCAM guide/wavefront detectors | Six E2V CCD 42-40, 20482 format |
| Filter set (current) | Z,Y,J,H,Ks, two narrowbands, one dark. |
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