X-ray spectral analysis of the low-luminosity active galactic nucleus
  NGC 7213 using long XMM-Newton observations
  We present the X-ray spectral results from the longest X-ray multi-mirror
mission-Newton observation, 133 ks, of the low luminosity active galactic
nucleus NGC 7213. The hardness ratio analysis of the X-ray light curves
discloses a rather constant X-ray spectral shape, at least for the observed
exposure time, enabling us to perform X-ray spectral studies using the total
observed spectrum. Apart from a neutral Fe K\alpha emission line, we also
detect narrow emission lines from the ionised iron species, Fe xxv and Fe xxvi.
Our analysis suggests that the neutral Fe K\alpha originates from a
Compton-thin reflector, while the gas responsible for the high ionisation lines
is collisionally excited. The overall spectrum, in the 0.3-10 keV energy band,
registered by the European Photon Imaging Camera, can be modelled by a
power-law component (with a slope of \Gamma\simeq1.9) plus two thermal
components at 0.36 and 8.84 keV. The low-energy thermal component is entirely
consistent with the X-ray spectral data obtained by the Reflection Grating
Spectrometer between 0.35-1.8 keV.
