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25 April 2024 |
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Quasi-Periodic Oscillation in Seyfert galaxies: Significance levels. The Case of Mrk 766 | | S. Benlloch
; J. Wilms
; R. Edelson
; T. Yaqoob
; R. Staubert
; | | Date: |
9 Oct 2001 | | Subject: | astro-ph | | Affiliation: | 3,4), R. Staubert ( IAA Tuebingen, Astronomy Department; UCLA, JHU, LHEA, NASA/GSFC | | Abstract: | We discuss methods to compute significance levels for the existence of quasi-periodic oscillations (QPOs) in Active Galactic Nuclei (AGN) which take the red-noise character of the X-ray lightcurves of these objects into account. Applying epoch folding and periodogram analysis to the XMM-Newton observation of the Seyfert galaxy Mrk 766, a possible QPO at a timescale of 4200s has been reported. Our computation of the significance of this QPO, however, shows that the 4200s peak is not significant at the 95% level. We conclude that the 4200s feature is an artifact of the red-noise process and not the result of a physical process within the Active Galactic Nuclei. | | Source: | arXiv, astro-ph/0110204 | | Services: | Forum | Review | PDF | Favorites | |
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