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We found a possible ~ 1 hour quasi-periodic oscillation (QPO) in a ~ 55 ksX-ray observation of the narrow-line Seyfert 1 galaxy MCG--06--30--15 made withthe XMM-Newton EPIC/pn detector in the energy range 0.3 -- 10 keV. We identifya total modulation of ~ 16% in the light curve and find a $\simeq$ 3670~squasi-period using Lomb-Scargle periodogram (LSP) and weighted waveletZ-transform (WWZ) techniques. Our analyses of eight light curves ofMCG--06--30--15, indicated the possible presence of an oscillation during oneof them. The LSP indicates a statistically significant ($\simeq$ 3$\sigma$) QPOdetection. A WWZ analysis shows that the signal at this possible roughly 3670speriod is present, and rather persistent, throughout the observation; however,a signal around 8735s is more persistent. We briefly discuss models that canproduce X-ray QPOs with such periods in narrow line Seyfert 1 galaxies, as bothother claimed QPO detections in this class of AGN had very similar periods.

Possible ~ 1 hour quasi-periodic oscillation in narrow-line Seyfert 1 galaxy MCG--06--30--15