# An X-Ray Periodicity of ∼1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766

@article{Zhang2017AnXP,
title={An X-Ray Periodicity of ∼1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766},
author={Peng Zhang and Peng Zhang and Jing-zhi Yan and Yi-zhong Fan and Qing-zhong Liu},
journal={The Astrophysical Journal},
year={2017},
volume={849}
}
• Published 12 July 2017
• Physics
• The Astrophysical Journal
In the narrow-line Seyfert 1 galaxy Mrk 766, a quasi-periodic oscillation (QPO) signal with a period of ∼6450 s is detected in the XMM-Newton data collected on 2005 May 31. This QPO signal is highly statistically significant at the ∼5σ confidence level, with a quality factor of Q = f / Δ f > 13.6 . The X-ray intensity changed by a factor of 3, with a root mean square fractional variability of 14.3%. Furthermore, this QPO signal is present in the data of all three EPIC detectors and two RGS…

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