Measurements of visible bremsstrahlung and automatic Bayesian inference of the effective plasma charge Zeff at W7-X. (2nd October 2019) - Pavone, A.; Hergenhahn, U.; Krychowiak, M.; Hoefel, U.; Kwak, S.; Svensson, J.; Kornejew, P.; Winters, V.; Koenig, R.; Hirsch, M.; Brunner, K.-J.; Pasch, E.; et al.