X-rays from Saturn: a study with XMM-Newton and Chandra over the years 2002–05 G. Branduardi-Raymont, A. Bhardwaj, R. F. Elsner and P. Rodriguez A&A, 510 (2010) A73 Published online: 12 February 2010 DOI: 10.1051/0004-6361/200913110