Collaboration, H., Abramowski, A., Acero, F., Aharonian, F., Akhperjanian, A., Anton, G., …Collaboration, H. (2011). Revisiting the Westerlund 2 field with the HESS telescope array. Astronomy & Astrophysics, 525, https://doi.org/10.1051/0004-6361/201015290