Institution: | Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, 85741 Garching, Germany;Department of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA;Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA;X-Ray and Observational Astronomy Group, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH |