四颗射电源在依巴谷和PPM星表中的光学定位

The Optical Positions of Four Radio Sources in HIP and PPM

利用北京天文台施密特望远镜的CCD巡天资料（BATC）中的20次观测，用IRAF软件处理得到星象中心位置，以依巴谷星表和PPM星表作为参考星表，用底片常数法进行处理，得到4颗河外射电源0851+202，1228+126，1442+101，1749+701的光学位置。文中还对所得到的位置与射电位置作了比较。

From the CCD survey data of the Schmidt telescope of Beijing Observatory (BATC),20 observations which include the radio sources were selected. The centers of the star images were obtained with the software IRAF. HIP and PPM catalogue are adopted as the reference catalogue, and the plate-constant-method is used in reduction. The optical positions of the four extragalactic radio sources, 0851 + 202, 1228 + 126, 1442 + 101, 1749 +701, were obtained and compared with the radio positions.