Institution: | Space Science Department, CLRC, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX; University of Oxford, Department of Astrophysics, Nuclear and Astrophysics Laboratory, Keble Road, Oxford OX1 3RH; Istituto di Radioastronomia CNR, via Gobetti 101, I-40129 Bologna, Italy; Osservatorio Astronomico di Bologna, via Zamboni 33, I-40126 Bologna, Italy; Dipartimento di Fisica, Universitàdi Bologna, Via Irnerio 46, I-40126 Bologna, Italy |