Ionization Structure of the Warm Wind in NGC 5548
The Nature of Highly-Ionized Absorbers in Dipping Low-Mass X-ray Binaries
High-Resolution X-ray Spectroscopy of the Active Galactic Nucleus NGC 4051 with Chandra
Principal Component Analysis of the X-ray Variability in NGC 7469
High Resolution X-ray Spectroscopy of Cool Stars using LETGS