Related paper Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV $\dNchdeta/\Npart/2$ as a function of $\Npart$ for different $\eta$ ranges. The lower panel shows the ratio of each distribution to the published distribution from data with $|\eta|< 0.5$.[png] [eps]