CCD photometry and long-term optical variability of PKS 2155-304

被引：12

作者：

Zhang, YH ^{[1
]}

Xie, GZ ^{[1
]}

机构：

[1] CHINA CTR ADV SCI & TECHNOL,WORLD LAB,BEIJING 100080,PEOPLES R CHINA

来源：

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES | 1996年 / 116卷 / 02期

关键词：

BL Lacertae objects; general individual (PKS 2155-304);

D O I：

10.1051/aas:1996114

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The paper presents the first evidence for long-term optical variability and colour behaviour of the X-ray-selected BL Lacertae object PKS 2155-304, which is the first example of its class. Our results show that the amplitude of the optical variations of PKS 2155-304 has been only about 1.4 magnitudes from its photometric history; no significant correlation between brightness and colours is found for PKS 2155-304. Our recent CCD photometry of PKS 2155-304 during September-October 1993 and July 1994 showed that it was the same brightness state as that in November 1991 (Smith et al. 1992).

引用

页码：289 / 293

页数：5

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