The azimuthal dependence of $R^{2}_{\rm out}$, $R^{2}_{\rm side}$, and $R^{2}_{\rm long}$ as a function of $\dphi=\mathrm{\varphi_{pair}}-\Psi_{3}$ for centrality percentile 20--30\% and four different $\kt$ ranges. Solid lines represent the fit to the functional forms of Eq. \ref{eq:radii_osc}. The shaded bands show the systematic uncertainty.