\begin{table}%t2
%\centering
\par
\caption {Uncertainties on abundances. $\log{A_{pf}}$: output with
the atmospheric parameters adopted; $\log{A_{pT}}$: output by
altering 1$\sigma$ on adopted $T\rm _{eff}$; $\log{A_{pmt}}$:
output by altering 1$\sigma$ on adopted metallicity;
$\log{A_{pl}}$: output by altering 1$\sigma$ on adopted $\log g$;
$\log{A_{p\xi}}$: output by altering 1$\sigma$ on adopted
microturbulent velocity $\xi$; $\sigma_l$:
$\sigma_{\log\epsilon}$, the uncertainty on $\log\epsilon$(X) from
Table~\ref{abuncom}; $\sigma_f$: $\sigma_{\rm [X/Fe]}$, the
uncertainty on [Ru/Fe] or [Hf/Fe] from Table~\ref{abuncom}.
\label{errab}} 
\begin{tabular}{ccccccccc}
\hline\hline
\noalign{\smallskip}
 El. & $\lambda$ ($\rm \AA$) & $\log{A_{pf}}$ & $\log{A_{pT}}$ & $\log{A_{pmt}}$ & $\log{A_{pl}}$ &
$\log{A_{p\xi}}$ & $\sigma_l$ & $\sigma_f$ \\
\hline
 & & & HD181053 & & & \\
Ru & 4080.574 & 1.99 & 2.01 & 1.91 & 2.01 & 1.99 & 0.47 & 0.46 \\
Ru & 4757.856 & 2.09 & 2.19 & 1.99 & 2.11 & 2.09 & & \\
Hf & 4080.437 & 1.13 & 1.14 & 1.13 & 1.28 & 1.13 & 0.17 & 0.15 \\
Hf & 4093.155 & 1.18 & 1.19 & 1.18 & 1.33 & 1.18 & & \\
\noalign{\smallskip}
\hline 
 & & & HD 87080 & & & \\
Ru & 4080.574 & 3.24 & 3.34 & 3.20 & 3.24 & 3.19 & 0.09 & 0.11 \\
Ru & 4757.856 & 3.44 & 3.54 & 3.40 & 3.44 & 3.44 & & \\
Hf & 4080.437 & 2.68 & 2.70 & 2.64 & 2.72 & 2.63 & 0.06 & 0.09 \\
Hf & 4093.155 & 2.48 & 2.50 & 2.44 & 2.52 & 2.46 & & \\
\hline
\end{tabular}
\end{table}