Abstract.
A timing analysis can provide useful information to characterize the central engines of AGN. We use the data from a recent long ASCA observation of the Narrow Line Seyfert 1 galaxy Ark 564 to investigate in detail its timing properties. The main result is that the process causing the variability is very likely to be linear. Using a nonlinear statistic based on the scaling index as a tool to discriminate time series, we demonstrate that the high and low count rate states are intrinsically different, with the high state characterized by higher complexity.
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Gliozzi, M., Brinkmann, W., Räth, C. Nonlinear Analysis of AGN Light Curves. In: Gilfanov, M., Sunyeav, R., Churazov, E. (eds) Lighthouses of the Universe: The Most Luminous Celestial Objects and Their Use for Cosmology. ESO ASTROPHYSICS SYMPOSIA. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10856495_42
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DOI: https://doi.org/10.1007/10856495_42
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-43769-7
Online ISBN: 978-3-540-48014-3
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