云台CCD-Coude光谱仪系统

The Coude-CCD Spectragraph System at the Yunnan Observatory

本文给出了用簿型CCD作为探测器的Coude高色散光谱系统的光路,机械调整装置,可用色散,一次可摄波段,光栅转角的计算,滤光片的选择。 从1987年11月起,对该系统进行了一年的试观测,获得了较好的结果,本文给出了从3900(?)—11000(?)的观测结果。观测结果表明可提高1.5—3个星等。

This paper reports on the Coude-CCD spectragraph system on the 1-m telescope of the Yunnan Observatory and the observations of high dispersion spectra of stars, the optical layout and the mechanical adjustment installation of this system. The selection and the calculation for some important parameters including the range of the wavelengths in one exposure, the dispo-sion, the rotating and the filters are presented. The test runs of this system have been carried out and good spectra have been obtained in the wavelength range from 3300 to 11000A since November, 1987. The observations of the Call K line of a Boo, solar Mgl 5176.327, 5172.698 and 5183.619 lines and solar HeI 10830 lines obtained during the past year with the system are given.The observed results show that the efficiency of the system is 1.5 to 3 magnitudes in comparison with the photographic emulsion of kodak IIaO or 103a-f.