| Affiliation: |
| AA(Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA ), AB(Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA ; Laboratory for X-Ray Astrophysics, NASA Goddard Space Flight Center, Code 662.0, Greenbelt, MD 20771, USA ), AC(Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA ), AD(Anglo-Australian Observatory, P.O. Box 296, Epping, NSW 1710, Australia ; Department of Physics, Queen's University, Kingston, Ontario K7L 3N6, Canada ), AE(Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada ), AF(Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132, USA ), AG(Department of Physics, University of Durham, Durham DH1 3LE, UK) |