[1] Univ Leicester, Dept Phys & Astron, Xray AStron Grp, Leicester LE1 7RH, Leics, England
[2] CEA Saclay, DSM, DAPNIA, SAp, F-91191 Gif Sur Yvette, France
[3] UC, CSIC, Inst Fis Cantabria, Santander 39005, Spain
[4] Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, France
[5] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany
[6] Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England
[7] Astrophys Inst Potsdam, D-14482 Potsdam, Germany
[8] UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England
[9] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[10] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
[11] Observ Astron, F-67000 Strasbourg, France
[12] Osserv Astron Brera, I-20121 Milan, Italy
[13] Subaru Telescope, NAOJ, Hilo, HI 96720 USA
[14] NASA, Goddard Space Flight Ctr, LHEA, Greenbelt, MD 20771 USA
[15] Univ Bristol, Dept Phys, Bristol BS8 1TL, Avon, England
[16] XMM Newton SOC, Madrid 28080, Spain