Exploring ionized gas in the quasar 3C249.1 with Fe K-shell absorption

Deep Fe Kshell absorption features are rarely found in quasars and their existence has not been convincingly justified in observations. If they do exist, as suggested in a few candidates, these features may indicate the presence of an additional substantial gas component in these objects. Evidence of a deep, possibly ionized Fe Kshell edge has been recently discovered in the lobedominated radio quasar 3C249.1 in our work,making it the second quasar of this kind. With the unprecedented effective area of XMM, we will be able to give convincing confirmation of their existence, and to determine the ionization stage, column density and Fe abundance of the absorbing gas, and, hopefully, to identify its origin. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]