Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hrxs.confe..40s&link_type=abstract
High Resolution X-ray Spectroscopy with XMM-Newton and Chandra, Proceedings of the international workshop held at the Mullard Sp
Physics
Scientific paper
We present results on the 140 ks RGS and the 350 ks LETGS observation of NGC 5548. The warm absorber found from these X-ray observations spans three orders of magnitude in ionization parameter, from O III, which is as lowly ionized as the warm absorber detected in the UV band, to Fe XXIV. For O VI the column density determined from our X-ray data is an order of magnitude larger than the column density measured in previous UV observations. We conclude that there is substantially more low ionized material than previously deduced from UV observations. However, only a few percent of the warm absorber detected in the X-rays is lowly ionized.
Edelson Richard
Kaastra Jelle S.
Steenbrugge Katrien Christine
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