Search for Saturn's X-ray aurorae at the arrival of a solar wind shock - Branduardi-Raymont, G; Ford, PG; Hansen, KC; Lamy, L; Masters, A; Cecconi, B; Coates, AJ; Dougherty, MK; Gladstone, GR; Zarka, P (JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2013)