NOTCam Ks filter
| NOT filter number: | 207 |
| Dimensions: | 25-mm round. |
| Status: | mounted |
| Filter name: | Ks |
| Marking on filter edge: | |
| Cosmetic defects: | |
 on: |
1.990 micron |
| central: |
|
| off: |
2.300 micron |
| FWHM: |
0.310 micron |
Transmission curves: gif image, ASCII data
Note:These transmission data have been scanned from the manufacturer's hardcopy. They are probably good to a couple of %. Details of the scanning procedure are not known, but the scan was made at ambient temperature. A small shift to the blue will be effected at operating temperature.
Notes: Purchased as part of the Gemini NIR filter consortium.
About the Ks filter: The Ks (K-short) filter has a shorter
cut-off wavelength than the standard K band in order to lower the
thermal component of the background (developed by M. Skrutskie). The cut-on
wavelength of Ks is the same as for K, which makes it more
useful than K' at "not very dry sites", although the passband becomes
a bit narrower than for K.
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