Revealing the X-ray variability of AGN with principal component analysisDOI: info:10.1093/mnras/stu2424v. 44772–96
Parker, M. L., Fabian, A. C., Matt, G., Koljonen, K. I. I., Kara, E., Alston, W., Walton, D. J., Marinucci, A., Brenneman, L., and Risaliti, G. 2015. "Revealing the X-ray variability of AGN with principal component analysis." Monthly Notices of the Royal Astronomical Society, 447 72–96. https://doi.org/10.1093/mnras/stu2424.