NOTCam Yn filter
| NOT filter number: | 222 |
| Dimensions: | 25-mm round. |
| Status: | mounted |
| Filter name: | Yn |
| Marking on filter edge: | |
| Cosmetic defects: | |
 on: |
1.005 micron |
| central: |
1.028 micron |
| off: |
1.051 micron |
| FWHM: |
0.046 micron |
Transmission curves: png image
Note: This transmission curve is from the manufacturer (made at ambient
temperature). Cold scans made with the NOTCam grism provided the the FWHM and
the actual off and on given above. Transmission curve and ascii table
from the cold scan inside NOTCam is pending.
Notes: Purchased as part of the Gemini NIR filter consortium.
About the Yn filter: Note that this filter was ordered
in a batch of 6 filters to several user institutions under the name "Z".
However, it is very different from the new Z band (FWHM: 0.84-0.93 mic) in the
UKIRT Infrared
Deep Sky Survey (UKIDSS) ZYJHK photometric system, which roughly
corresponds to the optical SDSS z'. On the other hand it has the same
central wavelength as the UKIDSS Y filter (FWHM: 0.97-1.07 mic), although it
is only half as broad. For this reason we have renamed it to Yn,
where the "n" stands for "narrow".
It should be mentioned that the Yn filter is quite close to the
IRWG iz (1.032 mic) filter (FWHM: 0.996 - 1.069 mic), a filter proposed by Young, Milone and Stagg (1994, A&AS 105, 259) following the recommendations of the Infrared Working Group (IRWG). See also Milone and Young (2005, PASP 117,
485).
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