Related paper Determination of the event collision time with the ALICE detector at the LHC Efficiency of the $t_{\rm{ev}}^{\rm{T0}}$ (circles), $t_{\rm{ev}}^{\rm{TOF}}$ (squares) and $t_{\rm{ev}}^{\rm{Best}}$ (diamond) as a function of the TOF track multiplicity for pp collisions at $\sqrt{s}$= 7 TeV.[png] [pdf]