【摘要】 为了深入研究密云射电源表分类样本的性质，作为系列工作的第一部分，选出了一个２３２～４８５０ＭＨｚ平谱源样本．１９９８年５月２９至３１日，利用北京天文台２．１６米望远镜和ＯＭＲ摄谱仪，对其中１８个目标进行了观测及光谱认证．结果共证认出１５个ＡＧＮ，其中３个信噪比不小于８的ＢＬＬａｃ天体和５个类星体（最大红移为２．５１９±０．００３）是新发现的．更多还原

【Abstract】 To study special radio sources of the Miyun Survey, 18 flat spectrum sources selected from 232 4850 MHz catalogs were followed up by optical identification as the first part of a series of research programs. Having been identification with the 2.16 m telescope at Beijing Astronomical Observatory in May, 1998, 15 AGNs were found in which three BL Lac objects with no less than 8 of signal to noise ratios, MYC1557 + 566, MYC1615 + 412, MYC1902 + 556, and five Quasars, MYC1415 + 385, MYC1615 + 365, MYC1722 + 527, MYC1825 + 345, MYC2207 + 357 are newly discovered.更多还原