Ionization Structure of the Warm Wind in NGC 5548 Steenbrugge, K. C. ; Kaastra, J. S. ; Crenshaw, D. M. ; Kraemer, S. B. ; Arav, N. ; George, I. M. ; Liedahl, D. A. ; Paerels, F. B. S. ; Turner, T. J. ; Yaqoob, T. Abstract Publication: The X-ray Universe 2005 Pub Date: January 2006 Bibcode: 2006ESASP.604..671S