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UIST Engineering

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UIST: Engineering: Filter Wheels

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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 Watson Varricatt. The table below lists the filter wheels' population.

11 July 2006 - 9 January 2007
Wheel 1 Wheel 2
Posn Filter 50% Cut on 50% Cut off Posn Filter 50% Cut on 50% Cut off
1 Open - - 1 Open - -
2 Blank - - 2 9.95mm circ aper - -
3 Black blank - - 3 blank 1.49 1.78
4 blank - - 4 B2 blocker 1.43 2.60
5 Hartmann mask - - 5 J-spectral 0.96 1.71
6 Z[MK] 1.008 1.058 6 HK-spectral 1.58 3.38
7 K_s_MK 1.990 2.310 7 H-spectral 1.27 2.50
8 Klong 2.019 2.434 8 KL-spectral 2.11 3.13
9 1.57(cont)[MK] 1.561 1.583 9 L-spectral 2.56 4.61
10 FeII[MK] 1.630 1.656 10 J[MK] 1.17 1.33
11 2.248(S1) 2.234 2.269 11 H[MK] 1.49 1.78
12 2.248 MK 2.235 2.270 12 K[MK] 2.03 2.37
13 2.122(S1) 2.106 2.124 13 3.4nbL 3.379 3.451
14 2.122 MK 2.103 2.134 14 3.5mbL 3.383 3.594
15 BrG MK 2.150 2.182 15 3.6nbLp 3.560 3.625
16 CH4_s 1.550 1.657 16 3.99(cont) 3.964 4.016
17 CH4_l 1.617 1.730 17 BrA 4.025 4.080
18 2.27cont[98] 2.257 2.291 18 PAH MK 3.264 3.318
19 2.42CO 2.413 2.436 19 3.28"Dust" 3.250 3.305
20 L'[MK] 3.428 4.108 20 3.05ice MK 2.970 3.125
21 M'[MK] 4.572 4.800 21 M-spectral 3.5 6.0
22 blank -- -- 22 Blank - -
23 PK50 2mm -- 2.7 23 PK50 2mm -- 2.7
24 Blank - - 24 blank - -

History

11 July 2006: The "Kshort" filter is replaced with a "K_s_MK" Mauna Kea Consotrium filter. The existing PK50 filter is replaced with a new one (with the same secifications).

Previous filter wheel arrangements are available here.


Contact: Chris Davis. Updated: Tue Jan 9 12:07:17 HST 2007

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