This paper is the fourth in a series publishing the results of an objective prism survey for emission-line galaxies with the 60 cm SchmidtTelescope of the Beijing Astronomical Observatory.
本文发表的是用北京天文台60厘米施密特望远镜进行发射线星系物端棱镜巡天结果的第四篇文章。
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The beam is then shaped to fill the entire 20.3 cm diameter output aperture of the Schmidt-Cassegrain telescope.