\begin{table}%tA.1
\caption{Atomic data of the \ion{Ni}{ii} transitions.
\label{NiII} }
%\centerline
{\begin{tabular}{l c c l}
\hline \hline
Transition & $\lambda_{\rm rest}$ & $f$ & Reference
\smallskip 
\\ 
\hline
\ion{Ni}{ii}~$\lambda$~1317 & 1317.2170 & 0.07786 & \citet{morton91} \\
\ion{Ni}{ii}~$\lambda$~1370 & 1370.1310 & 0.07690 & \citet{fedchak99} \\
\ion{Ni}{ii}~$\lambda$~1454 & 1454.8420 & 0.03230 & \citet{fedchak00} \\
\ion{Ni}{ii}~$\lambda$~1709 & 1709.6042 & 0.03240 & \citet{fedchak00} \\
\ion{Ni}{ii}~$\lambda$~1741 & 1741.5531 & 0.04270 & \citet{fedchak00} \\
\ion{Ni}{ii}~$\lambda$~1751 & 1751.9156 & 0.02770 & \citet{fedchak00} \\
\hline
\end{tabular}}
\end{table}