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

作　　者：CAO XiaoFeng1,2,YU WenFei1,YAN Zhen1 & SUN Li1 1 Shanghai Astronomical Observatory,Shanghai 200030,China 2 Institute of Astrophysics,Huazhong Normal University,Wuhan 430079,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第S1期143-146,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 10773023,10833002,10773004,and 10603002);the One Hundred Talents Project of the Chinese Academy of Sciences,the Shanghai Pujiang Program (Grant No. 08PJ14111);the National Basic Research Program of China (Grant No. 2009CB824800);the Starting Funds at the Shanghai Astronomical Observatory

摘　　要：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.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.

关 键 词：ACCRETION DISKS stars:individual(Scorpius X-1) optical:stars 

分 类 号：P172.2[天文地球—天文学]