The characteristics of the BOES (Bohyunsan Observatory Echelle Spectrograph) CCD camera is presented. In order to get optimum gain and readout noise of the CCD, we examine the variation of the gain and readout noise by changing the value of output drain voltage of the CCD and measuring the gain using transfer curve, which is defined as the plot of variance versus mean exposure level of a homogeneous light onto the CCD surface. The gain and readout noises are optimised to be 0.5e −/ADU and 3e−, which is good for highest signal-to-noise ratio and contrast for the low light level characteristics of the BOES. We also measure the dark count of the CCD by getting five dark images with 3600 seconds exposure time. The mean dark count from median stacked dark images is essentially zero. A table of positions of defected pixels is also presented.

• 박병곤(한국천문연구원) | B.-G. PARK (Korea Astronomy Observatory)
• 성현철(한국천문연구원) | H.-C. SEONG (Korea Astronomy Observatory)
• 장정균(한국천문연구원) | J.-G. JANG (Korea Astronomy Observatory)
• 장비호(한국천문연구원) | B.-H. JANG (Korea Astronomy Observatory)
• 이병철(한국천문연구원) | B.-C. LEE (Korea Astronomy Observatory)
• 박윤호(한국천문연구원) | Y.-H. PARK (Korea Astronomy Observatory)
• 김강민(한국천문연구원) | K.-M. KIM (Korea Astronomy Observatory)
• 한인우(한국천문연구원) | I. HAN (Korea Astronomy Observatory)