SOFIA observations of CO (12–11) emission along the L1157 bipolar outflow J. Eislöffel, B. Nisini, R. Güsten, H. Wiesemeyer and A. Gusdorf A&A, 542 (2012) L11 Published online: 10 May 2012 DOI: 10.1051/0004-6361/201218901