Optical observations of Scorpius X-1 in 2008: Evidence of rapid variability

Optical observations of Scorpius X-1 in 2008: Evidence of rapid variability
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2008 年天蝎座 X-1 的光学观测:快速变化的证据

DOI:
10.1007/s11433-010-0012-6
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发表时间:
2010-05
期刊:
Science China: Physics, Mechanics and Astronomy
影响因子:
--
通讯作者:
Sun Li
Sun Li
中科院分区:
其他
文献类型:
--
作者:
Cao XiaoFeng;Yu WenFei;Yan Zhen;Sun Li

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2008年,利用上海天文台1.56米望远镜对天蝎座X-1进行了曝光时间约为0.5秒的光学观测。利用这些观测结果,我们研究了三个短时间尺度(5,10,100秒)上的光通量的波动。我们发现,这三个时间尺度上的波动的标准偏差的高斯分布的7西格玛,5西格玛和3西格玛,分别不同。结果表明,这些短时间尺度上的强度变化不同于纯统计波动,我们认为,这是由于在光发射的固有可变性。
Optical observations of Sco X-1 with exposure times around 0.5 s were performed with the 1.56 m telescope of the Shanghai Astronomical Observatory in 2008. With these observations, we studied the fluctuation of the optical flux on three short timescales (5, 10, 100 s). We found that the standard deviations of fluctuations on these three timescales differ from those of Gaussian distributions by 7 Sigma, 5 Sigma and 3 Sigma, respectively. The result suggests that the variations in the intensity on these short timescales differ from pure statistical fluctuations, which, we suggest, is due to the intrinsic variability in the optical emission.
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