Study On X-Ray Obervations And Variability Of Blazar S5 0716+714

In this thesis, we introduced the general properties, the classification and the uniform model of AGN. We also discribed the subclass blazars’ properties and the significance of the X-ray band observations. We dealt with the 2-10 KeV band and 10-20 KeV band observations of blazar S50716+714 range from 1996 to 2010. Then,we made a quantitative analysis of the light variable intensity in the two bands during the whole observation period, We found that the light intensity of 2-10 KeV band and 10-20 KeV band were Fvar=34.7%, Fvar=56.0%. We also analyzed the correlation between 10-20 KeV variability and spectrum index variability of S50716+714 during the observation period. We found a significant negative correlation between 2009 and 2010. This shows that the radiation mechanism of 10-20 KeV band is mainly dominated by non-thermal radiation. Besides, we studied the correlation between the spectral index and the flux by variation of photon spectral index with 2-10 KeV band flux over time, and we analyzed each flare from 2009 to 2010. We have not found a unifying trend in the 10-20 KeV of S50716+714. At last, the results of DCF(discrete correlation function)method suggest that there is significant anti-correlation between the X-ray band and radio band.