Same data and RA-/Dec-residual plots as the left panels in Figure 3, with the dashed red curve denoting the f_SP = 1 GR curve for the best fitting orbit and mass. In addition, we show orbital models with the same central mass, distance and orbital parameters but now adding an extended mass component assumed to have a Plummer shape (Gillessen et al. 2017) showing the impact of adding a Plummer mass of M_ext within the 0.25″ apocenter radius of S2. Black, orange and blue solid curves show the changes expected if this extended Plummer mass is 0.1, 0.3 and 0.6% of M_• (4.4 × 10³, 8.9 × 10³ and 1.78 × 10⁴M_⊙ within the apocenter of S2, R_apo = 0.24″). Formal fitting shows that such an extended mass greater than about ≈0.1% of M_• is incompatible with the data.