\begin{table}%t8
      \caption{\label{oxabun}Oxygen abundances ($12 + \log$O/H).}
         %%\centering
\par
         \begin{tabular}{lcccccc}
            \hline\hline
            \noalign{\smallskip}
Name & \multicolumn{2}{c}{$p$-method} & \multicolumn{2}{c}{$R_{23}$} & N2Ha & Adopted \\
 & low & up & low & up & & abundance \\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
ce-042 & 8.52 & 7.91 & 8.49 & 8.24 & 8.68 & 8.68: \\
ce-048 & 7.58 & 8.61 & 7.73 & 8.71 & --  & 7.58 \\
ce-061 & 7.88 & 8.41 & 7.98 & 8.62 & 8.53 & 8.41 \\
ce-176 & 8.02 & 8.35 & 8.03 & 8.60 & 8.48 & 8.35 \\
ce-200 & 8.66 & 7.94 & 8.43 & 8.31 & 8.27 & 8.27: \\
ce-143 & 8.10 & 8.26 & 8.14 & 8.51 & 8.66 & 8.26 \\
sw-222 & 8.03 & 8.37 & 7.99 & 8.64 & 8.62 & 8.37 \\
\hline
                     \end{tabular}
\end{table}