HESS J1023-575 (Westerlund 2)
[References]
H.E.S.S.: Aharonian, F. et al., Astron. Astrophys. 467, 1075 (2007) O.Reimer et al., 30th ICRC (2007) / arXiv:0710.4057 [astro-ph] p.92 @