2003A&A...397..883G

We report on an XMM-Newton observation of the Seyfert 1 galaxy NGC 3227 performed in November 2000. The observed X-ray spectrum above 4keV is well fitted by a hard power law continuum (Γ≃1.5) and an absorption edge at 7.6keV. An Fe K emission line with an equivalent width of 213eV is detected at 6.4keV. The line is narrow suggesting contribution from material in low ionization states (<Fe XVII) relatively far from a central black hole. The continuum is strongly absorbed at soft energies by a column of neutral gas (≃6.5x10²²cm^–2) larger than previously measured and covering a significant fraction (≃90%) of the central source. The soft X-ray continuum is also attenuated due to the presence of ionized material (ξ≃50-90erg/s*cm) suggesting the presence of a substantial amount of gas (N_H≃2-9x10²¹cm^–2) in the vicinity (<0.4pc) of the nucleus. We find that NGC 3227 exhibits significant spectral variability above 2 keV on time scales of a few ksec during the XMM-Newton observations. This short term variability is likely related to variation in the continuum emission. Comparisons with previous observations indicate that variability on timescale of a month also involves a change in the column densities of neutral absorbing material along the line of sight to the nucleus.