UIST: Engineering: Slit Wheels 2002-2003
In spectroscopic mode UIST will only be used with the 0.12″/pixel plate scale.
The instrument has a 16-slot slit wheel which contains polarimetry masks, field stops and the slits for spectroscopy. The table below lists the slit wheel’s population.
September 2002 – 1 March 2003
| Posn | Slit | Description |
|---|---|---|
| 1 | 3pix-lowres-perpendicular (not used) | 0.36arcsec x 120arcsec |
| 2 | X-disp 5pixel slit | 0.60arcsec x 20arcsec |
| 3 | X-disp 4pixel slit | 0.38arcsec x 20arcsec |
| 4 | X-disp 3pixel slit | 0.36arcsec x 20arcsec |
| 5 | Small field stop (long cam) | 1arcmin x 1arcmin square |
| 6 | Long 4pixel slit | 0.48arcsec x 120arcsec |
| 7 | Long 3pixel slit | 0.36arcsec x 120arcsec |
| 8 | Long 2pixel slit | 0.24arcsec x 120arcsec |
| 9 | Long 1pixel slit | 0.12arcsec x 120arcsec |
| 10 | Pol mask spectroscopy | Two slots 20arcsec x 0.24arcsec (2pixel) |
| 11 | Pol mask imaging | Two slots 20arcsec x 120arcsec (170x1024pix) |
| 12 | Large field stop (short cam) | 2arcmin x 2arcmin square |
| 13 | 4pixel pinhole | 4pix x 4pix |
| 14 | 2pixel pinhole | 2pix x 2pix |
| 14 | 1pixel pinhole | 1pix x 1pix |
| 16 | IFU pick-off | 5arcsec x 5arcsec square |