\begin{table}%t6
\caption{Fitting zones used to derive the projected rotation
velocity and effective temperature.\label{tab:zones}} 
\begin{tabular}{cl}
\hline \hline\noalign{\smallskip}
\multicolumn{2}{c}{1. \vsini~determination}\\
zone & line-type\\
\hline\noalign{\smallskip}
4200 -- 4230 & Metals\\
4230 -- 4260 & Metals\\
4260 -- 4290 & Metals\\
4445 -- 4460 & Metals\\
4460 -- 4475 & Metals\\
4475 -- 4487 & \ion{Mg}{ii}\\
4485 -- 4500 & Metals\\
\hline\noalign{\smallskip}
\multicolumn{2}{c}{2. \teff~determination}\\
zone & line--type\\
\hline\noalign{\smallskip}
3915 -- 3950 & \ion{Ca}{ii} K--line\\
3950 -- 4000 & H$\epsilon$\\
4010 -- 4200 & H$\delta$\\
4200 -- 4270 & Metals\\
4270 -- 4400 & H$\gamma$\\
4450 -- 4500 & Metals\\
\hline\noalign{\smallskip}
\end{tabular}
\end{table}