1. Department of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, UK
2. Centre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK
3. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
4. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 169-221, Pasadena, CA 91109, USA
5. Instituto de Astrofísica and Centro de Astroingeniería, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile
6. Millennium Institute of Astrophysics (MAS), Nuncio Monseñor Sótero Sanz 100, Providencia, Santiago, Chile
7. Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, Colorado 80301, USA
8. Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre, via della Vasca Navale 84, I-00146 Roma, Italy
9. Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA
10. Department of Astronomy and Astrophysics, 525 Davey Lab, The Pennsylvania State University, University Park, PA 16802, USA
11. Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA
12. Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
13. Cahill Center for Astrophysics, 1216 East California, Boulevard, California Institute of Technology, Pasadena, CA 91125, USA
14. DTU Space-National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby, Denmark
15. INAF Osservatorio Astronomico di Bologna via Ranzani 1, I-40127 Bologna, Italy
16. Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
17. Max-Planck-Institut für Extraterrestrische Physik (MPE), Postfach 1312, D-85741 Garching, Germany
18. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
19. Institute of Space and Astronatical Science (JAXA), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, 252-5252, Japan
20. European Space Astronomy Center of ESA, PO Box 78, Villanueva de la Cañada, E-28691 Madrid, Spain
21. Columbia Astrophysics Laboratory, 550 W 120th Street, Columbia University, NY 10027, USA
22. Institute for Astronomy, Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland
23. INAF Istituto di Astrofisica Spaziale e Fisica cosmica di Bologna, via Gobetti 101, I-40129 Bologna, Italy
24. Dipartimento di Fisica e Astronomia (DIFA), Università di Bologna, viale Berti Pichat 6/2, I-40127 Bologna, Italy
25. ASDC–ASI, Via del Politecnico, I-00133 Roma, Italy
26. INAF–Osservatorio Astronomico di Roma, via Frascati 33, I-00040 Monte Porzio Catone (RM), Italy
27. X-ray Astrophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA