Affiliation: | School of Physics &Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS;Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA;Ritter Observatory, Department of Physics &Astronomy, University of Toledo, Toledo, OH 43606, USA;Space Science Institute, 3100 Marine Street, Suite A353, Boulder, CO 80303, USA |