The $\delta p_{\rm T}$ distribution (Eq. [8]) from the random cone (RC) procedure as function of cone azimuthal angle $\varphi_{\mathrm{RC}}$ relative to the event plane. In panel (a) the azimuthally-averaged background $\langle\rho_{\rm ch}\rangle$ has been subtracted; in panel (b) the azimuthally dependent $\rho_{\rm ch}(\phi)$ from an event-by-event fit of the $\pt$-density with Eq. [5]. The solid black line represents the mean of the $\delta p_{\rm T}$ distribution.