\begin{table}%t3
%\centering
\par
\caption {\label{tab3dco}{\ftac} O abundance corrections for several [C/O] ratios
from the OH line 3106~{\AA} with an excitation potential equal to
0.1~eV, using the 3D model with the parameters 
$T_{\rm eff}[{\rm K}]/\log(g[{\rm cm~s}^{-2}])/[{\rm Fe}/{\rm H}]=6270/4/-3$.}     
%\centering
\par
\begin{tabular}{lrrrrrrr}
\hline
\hline
\noalign{\smallskip}
[C/O] & [C/Fe] & [O/Fe] & \ftac \\       
\noalign{\smallskip}
[dex] & [dex] & [dex] & [dex] \\       
\noalign{\smallskip}
\hline
\noalign{\smallskip}
--1.0 & 0.0 & 1.0 & --1.53  \\
--0.6 & 0.4 & 1.0 & --1.49  \\
--0.2 & 0.8 & 1.0 & --1.37  \\
\noalign{\smallskip}
\hline     
\end{tabular}
\end{table}