New insights on Stephan’s Quintet: exploring the shock in three dimensions J. Iglesias-Páramo, L. López-Martín, J. M. Vílchez, V. Petropoulou and J. W. Sulentic A&A, 539 (2012) A127 Published online: 06 March 2012 DOI: 10.1051/0004-6361/201118055