Zeidler, P., Nota, A., Sabbi, E., Luljak, P., McLeod, A. F., Grebel, E. K., Pasquali, A., & Tosi, M. (2019). The Young Massive Star Cluster Westerlund 2 Observed with MUSE. II. MUSEpack—A Python Package to Analyze the Kinematics of Young Star Clusters. Astronomical Journal, 158(5), https://doi.org/10.3847/1538-3881/ab44bb