Deepest View of AGN X-Ray Variability with the 7 Ms Chandra Deep Field-South Survey

@article{Zheng2017DeepestVO,
  title={Deepest View of AGN X-Ray Variability with the 7 Ms Chandra Deep Field-South Survey},
  author={X. C. Zheng and Y. Q. Xue and W. N. Brandt and J. Li and Maurizio Paolillo and G. Yang and S. F. Zhu and Bin Luo and Ming Sun and Thomas M. Hughes and Franz Erik Bauer and Fabio Vito and J. X. Wang and T. Liu and Cristian Vignali and Xinwen Shu},
  journal={The Astrophysical Journal},
  year={2017},
  volume={849}
}
We systematically analyze the X-ray variability of active galactic nuclei (AGNs) in the 7 Ms Chandra Deep Field-South survey. On the longest timescale (≈17 years), we find only a weak (if any) dependence of X-ray variability amplitudes on energy bands or obscuration. We use four different power spectral density (PSD) models to fit the anticorrelation between normalized excess variance ( ) and luminosity, and obtain a best-fit power-law index for the low-frequency part of the AGN PSD. We also… 

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