Left: ${C \left(\Delta \phi \right)}$ at $|{\Delta\eta}| > 0.8$ for higher-$\pt$ particles than in Fig.2. The Fourier harmonics ${V_{n\Delta}}$ for $n \leq 5$ are superimposed in color. Their sum is shown as the dashed curve. The ratio of data to the $n \leq 5$ sum is shown in the lower panel. Right: Amplitude of ${V_{n\Delta}}$ harmonics vs.\ $n$ at the same ${p_{T}^{t}}$, ${p_{T}^{a}}$ for two centrality bins. Systematic uncertainties are represented with boxes (see section 4 Factorization and the global fit), and statistical uncertainties are shown as error bars.