Posterior distribution of the ratio of the transition radius to the soliton scale radius for Dragonfly 44 (orange histogram), compared with the relevant bounds (violet region) for reasonable FDM halos at the inferred halo mass (see Robles et al. 2019, Section 2.2). The dotted violet line shows the approximate value from the FDM simulations of Mocz et al. (2017). Over two-thirds of the posterior mass for Dragonfly 44 is within these bounds, indicating good agreement with FDM predictions.