Rosat observations of PKS 2155-304

被引：0
|
作者：
Brinkmann, W [1 ]
Siebert, J [1 ]
机构：
[1] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany
来源：
BL LAC PHENOMENON | 1999年 / 159卷
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D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The BL Lac object PKS 2155-304 was studied in two very deep ROSAT HRI observations in May and in November, 1996. The observed intensity variations can be represented by a superposition of individual 'shots' of similar duration (similar to 1 day) and amplitude and long term smooth luminosity changes. A comparison with previous ROSAT observations confirms the persistence of these phenomena. The close correspondence between the light curves of November 1996 and November 1991 strongly argues against a micrc-lensing interpretation of these achromatic variations. BL Lac objects might just be the first active galactic nuclei where system intrinsic periodic variations can be observed in X-rays.
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页码：168 / 171
页数：4
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