HADES collaboration (113 authors)Blanco, A.Bordalo, P.Fonte, P.Franco, C.Lopes, L.Mangiarotti, A.Ramos, S.Silva, L.2019-02-052019-02-052018-05-24http://dx.doi.org/10.1140/epja/i2018-12513-7http://hdl.handle.net/10400.26/27541The centrality determination for Au+Au collisions at 1.23A GeV, as measured with HADES at the GSI-SIS18, is described. In order to extract collision geometry related quantities, such as the average impact parameter or number of participating nucleons, a Glauber Monte Carlo approach is employed. For the application of this model to collisions at this relatively low centre-of-mass energy of $\sqrt{s_{\mathrm{NN}}} = 2.42$ GeV special investigations were performed. As a result a well defined procedure to determine centrality classes for ongoing analyses of heavy-ion data is established.engjournal article2019-02-05