UIST Engineering
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UIST: Engineering: Slit Wheels
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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.
1 March 2003 - 1 February 2006
| Posn |
Slit |
Description |
Ref |
|
| 1 |
Small field stop (long cam) |
1arcmin x 1arcmin square |
V |
| 2 |
X-disp 5pixel slit |
0.60arcsec x 20arcsec |
O |
| 3 |
X-disp 7pixel slit |
0.84arcsec x 20arcsec |
Z |
| 4 |
X-disp 3pixel slit |
0.36arcsec x 20arcsec |
M |
| 5 |
Large field stop (short cam) |
2arcmin x 2arcmin square |
D |
| 6 |
Long 4pixel slit |
0.48arcsec x 120arcsec |
K |
| 7 |
Long 5pixel slit |
0.60arcsec x 120arcsec |
L |
| 8 |
Long 2pixel slit |
0.24arcsec x 120arcsec |
I |
| 9 |
Long 1pixel slit |
0.12arcsec x 120arcsec |
H |
| 10 |
Long 7pixel slit |
0.84arcsec x 120arcsec |
Y |
| 11 |
Pol mask imaging |
Two slots 20arcsec x 120arcsec (170x1024pix) |
F |
| 12 |
Pol 2-pix spectroscopy |
Two slots 0.24arcsec x 20arcsec |
G |
| 13 |
Pol 5-pix spectroscopy |
Two slots 0.60arcsec x 20arcsec |
X |
| 14 |
2pixel pinhole |
2pix x 2pix |
B |
| 15 |
large hole |
-- |
N |
| 16 |
IFU pick-off |
5arcsec x 5arcsec square |
-- |
Note: Datum switch region posns 5-10.
Previous slit wheel arrangement (Feb 2002 - Mar 2003) is available
here.
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