EXTENSIVE X-RAY MONITORING OF THE BROAD-LINE RADIO GALAXY 3C-382

被引:10
作者
BARR, P [1 ]
GIOMMI, P [1 ]
机构
[1] EUROPEAN SPACE TECHNOL CTR,EUROPEAN SPACE AGCY,EXOSAT OBSERV,DEPT SPACE SCI,2200 AG NOORDWIJK,NETHERLANDS
关键词
D O I
10.1093/mnras/255.3.495
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The results of an intensive monitoring campaign of the X-ray light curve of the broad-line radio galaxy 3C 382, performed using the EXOSAT observatory over a five-month period in summer 1985, are presented. Significant variations on a time-scale of several days are found in both the hard and soft X-ray bands, probably superimposed on a systematic long-term (months) trend. However, no evidence was found for such variability on shorter ( < 6 hr) time-scales. A variable soft excess is seen with the Low Energy telescope. The soft excess seems coupled to the hard X-ray continuum on long time-scales (months) but not on short time-scales (weeks or less). We suggest that long-term variations could be associated with a common power source for both soft and hard X-ray emission, perhaps associated with details of the accretion process, while rapid variability may indicate different emission mechanisms in the two energy bands.
引用
收藏
页码:495 / 501
页数:7
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