【摘要】 天文学家拍摄的天体光纤光谱被CCD记录下来之后,得到的仅仅是二维光谱图像。而这些光谱图像无法直接使用,需要借助一定的抽谱方法把二维CCD光谱图像转换成一维光谱。抽谱方法大致分为四类:孔径抽谱方法、优化的孔径方法、轮廓拟合方法和反卷积方法。本文将详细介绍这些方法的优缺点和适用范围。同时结合郭守敬望远镜(LAMOST)CCD光谱图像的特点对这些方法进行讨论。更多还原

【Abstract】 Astronomers can get 2D fiber spectroscopic images by a CCD, but they cannot use them directly, so astronomers must translate them into 1D spectra. There are generally four extraction methods: aperture extraction method, optimal extraction method, profile fitting method and de-convolution method. In this paper, these four methods according to CCD images of Guoshoujing Telescope(LAMOST) are discussed.更多还原