Lobban, A. P.A. P.LobbanTurner, T. J.T. J.TurnerReeves, J. N.J. N.ReevesBRAITO, ValentinaValentinaBRAITOMiller, L.L.Miller2022-06-172022-06-1720200035-8711http://hdl.handle.net/20.500.12386/32399We present a series of X-ray variability results from a long XMM-Newton + NuSTAR campaign on the bright, variable AGN NGC 3227. We present an analysis of the light curves, showing that the source displays typically softer-when-brighter behaviour, although also undergoes significant spectral hardening during one observation which we interpret as due to an occultation event by a cloud of absorbing gas. We spectrally decompose the data and show that the bulk of the variability is continuum-driven and, through rms variability analysis, strongly enhanced in the soft band. We show that the source largely conforms to linear rms-flux behaviour and we compute X-ray power spectra, detecting moderate evidence for a bend in the power spectrum, consistent with existing scaling relations. Additionally, we compute X-ray Fourier time lags using both the XMM-Newton and - through maximum-likelihood methods - NuSTAR data, revealing a strong low-frequency hard lag and evidence for a soft lag at higher frequencies, which we discuss in terms of reverberation models.STAMPAenArticle10.1093/mnras/staa10082-s2.0-85096965325https://academic.oup.com/mnras/article/494/4/5056/5820815http://arxiv.org/abs/2004.03824v22020MNRAS.494.5056LFIS/05 - ASTRONOMIA E ASTROFISICA