昴星团内六对双星的月掩星光电观测

PHOTOELECTRIC OCCULTATION OBSERVATIONS OF SIX DOUBLE STARS IN PLEIADES

1987年12月31日,我们观测了月掩昴星团现象,得到昴星团区域内一批恒星的掩星衍射曲线,经归算,其中六对恒星是双星,它们是SAO 0761 31,0761 40,0761 55,0761 83,076236和076 259.这是用1.56米望远镜所作的首批月掩星光电观测.月掩星的光变曲线和理论计算的拟合曲线列在图1(a)—(f)中.计算结果列于表2.

Photoeletric measurements of lunar occultation in Pleiades were made on Dec. 31, 1987 and diffraction patterns of occultation for several stars were obtained. The results show that six stars are double stars. They are SAO 076131, 076140, 076155, 076183, 076236, and 076259. This is one of the first group of photoelectric observations of lunar occultation with the 156 cm telescope of the Shanghai Observatory. Their light carves of occultation and fitting curves of calculation are in Fig. 1 (a)—(f). The results of calculation are in Table 2.