Figure 1

Elliptic flow coefficient as a function of $\pt$ for prompt $\Dzero$, $\Dplus$,$\Dstar$ and $\Ds$ mesons and their charge conjugates for $\PbPb$ collisions in the centrality class 30--50\% The bottom panel also shows the average$v_2$ of $\Dzero$, $\Dplus$ and $\Dstar$. The symbols are positionedhorizontally at the average $\pt$ of the reconstructed D mesons Vertical error bars represent the statistical uncertainty, empty boxes the systematicuncertainty associated with the D-meson anisotropy measurement and the event-planeresolution. Shaded boxes show the feed-down uncertainty.
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