Corpus ID: 121676511

The Properties and the Evolution of the Highly Ionized Gas in MR2251-178

@inproceedings{Kaspi2003ThePA,
  title={The Properties and the Evolution of the Highly Ionized Gas in MR2251-178},
  author={Shai Kaspi and Hagai Netzer and Doron Chelouche and I. M.George and T. J. Turner and K. Nandra},
  year={2003}
}
We present the first XMM-Newton observations of the radio-quiet quasar MR2251-178. We model the X-ray spectrum with two power laws, one at high energies with a slope of \Gamma=1.6 and the other to model the soft excess with a slope of \Gamma=2.9, both absorbed by at least two warm absorbers (WAs). The high-resolution grating spectrum shows emission lines from N VI, O VII, O VIII, Ne IX, and Ne X, as well as absorption lines from the low ionization ions O III, O IV, and O V. A study of the… Expand