Since EXOSAT produced the first good quality X-ray light curves of Seyfert galaxies there have been several claims of quasi-periodic oscillations (QPOs). None of these have withstood repeated analyses and observations. We review some problems concerning the detection of QPOs.
Cite
@article{arxiv.astro-ph/0506456,
title = {Detecting X-ray QPOs in Active Galaxies},
author = {S. Vaughan and P. Uttley},
journal= {arXiv preprint arXiv:astro-ph/0506456},
year = {2009}
}
Comments
7 pages. 1 figure. Accepted for publication on Advances in Space Research, Special Issue Proceedings of 35th COSPAR (Paris, France, 18-25 July 2004)