UIST – Filter Wheels (2004 – 2006)
UIST has two 24-slot filter wheels which contain filters for both imaging and for blocking the spectroscopy grisms. The MKO consortium filter set is installed where possible (see the discussion of new JHK standards for example). Click on the filter name to see an image of the profile (where available). Text files are also available giving transmission profiles for some of the filters, contact Sandy Leggett. The table below lists the filter wheels’ population.
1 March 2004 – 11 July 2006
Wheel 1
Posn | Filter | 50% Cut on | 50% Cut off |
1 | Open | – | – |
2 | Blank | – | – |
3 | Black blank | – | – |
4 | blank | – | – |
5 | Hartmann mask | – | – |
6 | Z[MK] | 1.008 | 1.058 |
7 | Kshort | 2.028 | 2.290 |
8 | Klong | 2.019 | 2.434 |
9 | 1.57(cont) [MK] | 1.561 | 1.583 |
10 | FeII[MK] | 1.630 | 1.656 |
11 | 2.248(S1) | 2.234 | 2.269 |
12 | 2.248[MK] | 2.235 | 2.270 |
13 | 2.122(S1) | 2.106 | 2.124 |
14 | 2.122 MK | 2.103 | 2.134 |
15 | BrG MK | 2.150 | 2.182 |
16 | CH4_s | 1.550 | 1.657 |
17 | CH4_l | 1.617 | 1.730 |
18 | 2.27cont[98] | 2.257 | 2.291 |
19 | 2.42CO | 2.413 | 2.436 |
20 | L'[MK] | 3.428 | 4.108 |
21 | M'[MK] | 4.572 | 4.800 |
22 | blank | — | — |
23 | PK50 2mm | — | 2.7 |
24 | Blank | – | – |
Wheel 2
Posn | Filter | 50% Cut on | 50% Cut off |
1 | Open | – | – |
2 | 9.95mm circ aper | – | – |
3 | blank | 1.49 | 1.78 |
4 | B2 blocker | 1.43 | 2.60 |
5 | J-spectral | 0.96 | 1.71 |
6 | HK-spectral | 1.58 | 3.38 |
7 | H-spectral | 1.27 | 2.50 |
8 | KL-spectral | 2.11 | 3.13 |
9 | L-spectral | 2.56 | 4.61 |
10 | J[MK] | 1.17 | 1.33 |
11 | H[MK] | 1.49 | 1.78 |
12 | K[MK] | 2.03 | 2.37 |
13 | 3.4nbL | 3.379 | 3.451 |
14 | 3.5mbL | 3.383 | 3.594 |
15 | 3.6nbLp | 3.560 | 3.625 |
16 | 3.99(cont) | 3.964 | 4.016 |
17 | BrA | 4.025 | 4.080 |
18 | PAH MK | 3.264 | 3.318 |
19 | 3.28″Dust” | 3.250 | 3.305 |
20 | 3.05ice MK | 2.970 | 3.125 |
21 | M-spectral | 3.5 | 6.0 |
22 | Blank | – | – |
23 | PK50 2mm | — | 2.7 |
24 | blank | – | – |
Previous filter wheel arrangements are available here.