Energy-shifted lines in XMM-Newton epic spectra of Seyfert galaxies

A. L. Longinotti*, S. Sim, K. Nandra, P. O'Neill, M. Cappi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In the recent literature on AGNs it has been often reported that spectra of Seyfert 1 Galaxies show resonant absorption lines of Fe K which are redshifted from the rest frame position. Such lines are often found with marginal significance but, if real, could potentially open up new avenues to study the circumnuclear gas in the black hole environment. It is also extremely important to take them into account in X-ray spectral analysis because of the influence they have in the correct estimation of spectral parameters, Fe Kα line in primis. An XMM-Newton observation of Mrk 335 is reported here as a case study: a narrow feature has been detected at 5.9 keV, i.e. with a redshift corresponding to a velocity of v∼ 0.15c. Preliminary results on the statistical significance of narrow absorption and emission lines in a sample of PG QSOs observed by XMM-Newton are also included.

Original languageEnglish
Title of host publicationX-ray Universe 2005
Number of pages6
Publication statusPublished - 10 Apr 2006
Externally publishedYes
EventX-ray Universe 2005 - Madrid, Spain
Duration: 26 Sep 200530 Sep 2005


ConferenceX-ray Universe 2005


  • AGN
  • Spectroscopy
  • X-rays

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science


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