1. An X-Ray Study of Gravitational Lenses Open Access Author: Dai, Xinyu Title: An X-Ray Study of Gravitational Lenses Graduate Program: Astronomy and Astrophysics Keywords: gravitational lensesactive galactic nucleicosmologydark matter File: Download thesis.pdf Committee Members: Gordon Paul Garmire, Committee Chair/Co-ChairGeorge Chartas, Committee Chair/Co-ChairMichael Eracleous, Committee MemberRobin Bruce Ciardullo, Committee MemberLee S Finn, Committee Member