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We present updated measurements of time-dependent CP asymmetries in fullyreconstructed neutral B decays containing a charmonium meson. The measurementsreported here use a data sample of $(465\pm 5)\times 10^6$ $\Upsilon(4S) \to B\bar{B}$ decays collected with the BABAR detector at the PEP-II $B$ factory.The time-dependent CP asymmetry parameters measured from $J/\psi K_S^0$,$J/\psi K_L^0$, $\psi(2S) K_S^0$, $\chi_{c1} K_S^0$, $\eta_c K_S^0$, and$J/\psi K^{*0}$ decays are \begin{eqnarray} C_f &=& 0.026 \pm 0.020(stat) \pm0.016(syst), S_f &=& 0.691 \pm 0.029(stat) \pm 0.014(syst). \end{eqnarray}

Update of Time-Dependent CP Asymmetry Measurements in $b$-->$c\bar{c}s$ Decays