The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 37 Issue 2
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- Pages.222.2-222.2
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- 2012
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- 1226-2692(pISSN)
Environment Effects on the Stability of the CQUEAN CCD
- Choi, Nahyun (School of Space Research, Kyung Hee University) ;
-
Pak, Soojong
(School of Space Research, Kyung Hee University)
;
- Choi, Changsu (Dept. of Physics and Astronomy, Seoul National University) ;
- Park, Won-Kee (Korea Astronomy & Space Science Institute) ;
- Im, Myungshin (Dept. of Physics and Astronomy, Seoul National University) ;
- Jeon, Yiseul (Dept. of Physics and Astronomy, Seoul National University) ;
- Baek, Giseon (School of Space Research, Kyung Hee University)
- Published : 2012.10.17
Abstract
Camera for QUasars in EArly uNiverse (CQUEAN) is an optical CCD camera attached to the 2.1m Otto Struve telescope at the McDonald Observatory, USA. CCD output signal contains the electrons generated by photoionization of incident light and thermal ionization. Therefore reliable photometric result can be obtained only under the stable condition of CCD thermal properties. We investigated the temperature dependency of the various characteristics of CQUEAN CCD chip, including bias level, dark level, gain, and quantum efficiency (QE), with the CQUEAN observation and calibration data obtained during 2012 May run. We discuss the environmental effects, i.e., ambient temperature, as well as CCD temperature on the stability of its characteristics.
Keywords