The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 39 Issue 1
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- Pages.51.2-51.2
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- 2014
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- 1226-2692(pISSN)
Filter wheel design for CQUEAN II
- Kim, Sanghyuk (School of Space Research, Kyung Hee University) ;
-
Pak, Soojong
(School of Space Research, Kyung Hee University)
;
- Lee, Hye-In (School of Space Research, Kyung Hee University) ;
- Im, Myunshin (CEOU, Department of Physics and Astronomy, Seoul National University) ;
- Shin, Sang-Kyo (YoonSeul)
- Published : 2014.04.10
Abstract
CQUEAN(Camera for QUasars in EArly uNiverse) has been used at the 2.1 m Otto Struve Telescope of the McDonald Observatory since 2010. This camera is optimized at 0.7 - 1.1 um for the survey of Lyman break of high redshift (z > 5) quasars in the early universe. The current system has a filter wheel consist of seven (g', r', I', z', Y, Iz and Is) broad-band filters. We are upgrading this filter wheel to have 20 narrow band filters, with which we can take spectral energy distributions of targets. The new filter wheel consists of interchangeable cartridges for 50 mm square filters, a speed reducer unit, and a step motor. This new design of the large size filter wheel can be applied to other large format CCD cameras.
Keywords