A. J. Goodwin (1), D. K. Galloway (1), J. J. M. in 't Zand (2), E. Kuulkers (3), A. Bilous (4), L. Keek (5) ((1) School of Physics, Astronomy, Monash University, (2) SRON Netherlands Institute for Space Research, (3) ESA/ESTEC, (4) Anton Pannekoek Institute for Astronomy, University of Amsterdam, (5) Department of Astronomy, University of Maryland)