\begin{table}%t6
\caption{Summary of uncertainties in the derived cosmological parameters. The dominant
systematic uncertainty arises from the photometric calibration, itself
dominated by the~$\ime$ and~$\zme$ band contributions.
\label{tab:uncertainties}}
%\centering
\par
\begin{tabular}{c|ccc|cc}
\hline \hline 
Source &~$\sigma(\om$)  &~$\sigma(\ot)$ &~$\sigma(w)$ &~$\sigma(\om)$  & ~$\sigma(w)$\\
       & (flat)        & & & \multicolumn{2}{c}{(with BAO)}\\
\hline 
Zero-points               &  0.024   &   0.51    &  0.05    & 0.004  & 0.040    \\
Vega spectrum             &  0.012   &   0.02    &  0.03    & 0.003  & 0.024    \\
Filter bandpasses         &  0.007   &   0.01    &  0.02    & 0.002  & 0.013    \\
Malmquist bias            &  0.016   &   0.22    &  0.03    & 0.004  & 0.025    \\
\hline
Sum ({\it sys})                 &  0.032   &   0.55    &  0.07    & 0.007  & 0.054    \\
\hline
Meas. errors        &  0.037   &   0.52    &  0.09    & 0.020  & 0.087    \\
$U-B$ color ({\it stat})           &  0.020   &   0.10    &  0.05    & 0.003  & 0.021    \\
\hline
Sum ({\it stat})                &  0.042   &   0.53    &  0.10    & 0.021  & 0.090    \\
\hline 
\end{tabular}
\end{table}