Collaboration, H., Abramowski, A., Acero, F., Aharonian, F., Akhperjanian, A., Anton, G., …Zechlin, H. (2011). A new SNR with TeV shell-type morphology: HESS J1731-347. Astronomy and Astrophysics, 531, https://doi.org/10.1051/0004-6361/201016425