Duncan K. Galloway (1, 2), Adelle J. Goodwin (1), Laurens Keek (3, 4) ((1) School of Physics, Astronomy, Monash University, (2) Monash Centre for Astrophysics, (3) X-ray Astrophysics Laboratory, Astrophysics Science Division, NASA/GSFC, (4) CRESST, the Department of Astronomy, University of Maryland)