Event plane resolution correction for azimuthal anisotropy in wide centrality bins

We provide a method to correct the observed azimuthal anisotropy in heavy-ion collisions for the event plane resolution in a wide centrality bin. This new procedure is especially useful for rare particles, such as Ω baryons and J/ψ mesons, which are difficult to measure in small intervals of centrality. Based on a Monte Carlo calculation with simulated v2 and multiplicity, we show that some of the commonly used methods have a bias of up to 15%.