\begin{table}%t1
\caption{Ages and age uncertainties~$\sigma_{\rm Age}$ of metal-poor stars and the Sun obtained for different chronometer pairs~$X$/$Y$.\label{starage}}
\par
%\centerline
{\begin{tabular}{llrrrrr}
%%\centering
\par
\hline\noalign{\smallskip}
\hline\noalign{\smallskip}
$X$/$Y$ & Object & \multicolumn{4}{c}{Age$^{a}$} & $\sigma_{\rm Age}$\\
    &        & \multicolumn{4}{c}{[Gyr]} & [Gyr]\\
\hline%\noalign{\smallskip}
%
Th/Eu & HD 115444      & 11.7  & 10.4  & 12.3  & 14.6 &  6.9\\
Th/Os & HD 115444      & 30.1  & 24.3  &        &       &  7.7\\
Th/Eu & CS 22892-052$^{b}$ & 14.8  & 13.4  & 15.4  & 17.6 &  6.4\\
Th/Hf & CS 22892-052   & 27.7  &        &        &       &  7.4\\
Th/Os & CS 22892-052   & 19.6  & 14.8  &        &       & 18.5\\
Th/Eu & CS 22892-052   & 15.4  & 13.1  & 15.0  & 17.3 &  5.3\\
Th/Os & CS 22892-052   & 24.4  & 18.6  &        &       &  5.1\\
Th/Ir & CS 22892-052   & 25.8  & 19.1  & 25.2  &       & 12.9\\
Th/Eu & CS 22892-052   & 12.1  & 11.7  & 13.7  & 15.9 &  4.8\\
Th/Hf & CS 22892-052   & 24.6  &        &        &       &  6.1\\
Th/Os & CS 22892-052   & 26.0  & 20.3  &        &       &  7.7\\
Th/Ir & CS 22892-052   & 19.0  & 13.3  & 19.4  &       &  6.1\\
Th/Eu & BD +17 3248    &  7.6  &  6.3  &  8.3  & 10.5 &  5.3\\
Th/Os & BD +17 3248    & 27.7  & 22.0  &        &       &  6.1\\
Th/Ir & BD +17 3248    & 20.7  & 14.0  & 19.1  &       &  7.7\\
Th/Eu & HD 221170      & 11.7  & 10.4  & 12.3  & 14.6 &  4.2\\
Th/Hf & HD 221170      & 21.9  &        &        &       &  2.9\\
Th/Os & HD 221170      & 27.1  & 22.3  &        &       &  5.3\\
Th/Ir & HD 221170      & 20.7  & 14.0  & 19.1  &       &  6.1\\
Th/Eu & CS 31082-001   &  0.9  & -1.5  &  0.5  &  2.7 &  2.9\\
Th/Hf & CS 31082-001   & 15.2  &        &        &       &  8.0\\
Th/Os & CS 31082-001   & 17.9  & 12.1  &        &       &  5.9\\
Th/Ir & CS 31082-001   &  6.5  & -0.2  &  5.9  &       &  4.1\\
 U/Th & CS 31082-001   & 16.6  & 13.3  & 14.6  &       &  5.9\\
Th/Eu & HE~1523-0901   & 11.4  &  9.5  & 11.0  & 13.2 &  3.1\\
Th/Os & HE~1523-0901   & 16.9  & 10.1  &        &       &  3.1\\
Th/Ir & HE~1523-0901   & 18.0  & 12.3  & 17.4  &       &  3.1\\
 U/Th & HE~1523-0901   & 15.0  &        &        &       &  2.6\\
Th/Eu & M51 K341       & 11.0  &  9.7  & 12.6  & 13.9 &  6.9\\
Th/Eu & M51 K462       & 14.1  & 12.7  & 14.7  & 16.9 &  6.9\\
Th/Eu & M51 K583       &  6.6  &  4.3  &  7.2  &  8.5 &  6.9\\
%%
%Yong2008
Th/Hf & M4  L1411     & 32.5  &       &       &      &  3.4\\
Th/Hf & M4  L1411     & 32.5  &       &       &      &  3.4\\
Th/Hf & M4  L1501     & 25.5  &       &       &      &  3.4\\
Th/Hf & M4  L1514     & 37.2  &       &       &      &  3.4\\
Th/Hf & M4  L2406     & 32.5  &       &       &      &  3.4\\
Th/Hf & M4  L2617     & 23.2  &       &       &      &  3.4\\
Th/Hf & M4  L3209     & 30.2  &       &       &      &  3.4\\
Th/Hf & M4  L3413     & 23.2  &       &       &      &  3.4\\
Th/Hf & M4  L4511     & 27.8  &       &       &      &  3.4\\
Th/Hf & M4  L4611     & 37.2  &       &       &      &  3.4\\
Th/Hf & M5  IV-81     & 18.5  &       &       &      &  3.4\\
Th/Hf & M5  IV-82     & 18.5  &       &       &      &  3.4\\
%%
%Johnsons-2001
Th/Eu & HD 108577  &  7.8  &  6.2  &  8.4  & 10.1  &  3.4\\
Th/Eu & HD 115444  &  9.6  &  8.1  & 10.3  & 11.9  &  3.6\\
Th/Eu & HD 186478  & 16.6  & 15.1  & 17.3  & 18.9  &  4.3\\
Th/Eu & BD +82856  &  7.3  &  5.8  &  8.0  &  9.6  &  5.5\\
Th/Eu & M92 VII-18 &  6.8  &  5.3  &  7.5  &  9.1  &  5.3\\
%%
%SUN%
Th/Eu & Sun &  3.3 &  1.7 &  3.9 &  5.6 & 2.0\\ 
Th/Hf & Sun & 22.3 &      &      &      & 2.3\\
Th/Os & Sun & 14.1 &  8.6 &      &      & 4.9\\
Th/Ir & Sun & 10.1 &  4.0 &  9.6 &      & 4.9\\
% U/Th & Sun & 16.9 &      &      &      & 0.9\\
%%
\noalign{\smallskip}
\hline
%\end{tabular}
%%\end{center}
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\end{tabular}}
\medskip
$^{a}$~Ages and age uncertainties are obtained from
    formulae~\eref{e:tdec1a} and \eref{e:sigtsiga} using the abundances listed in Table~\ref{starabbo}. 
    The four ``Age'' columns give ages based on production rations~$\beta$ of \citet{kratz07}, \citet{sneden03}, \citet{schatz02}, and
    \citet{cowan02} (in that order) according to Table~\ref{pr}. The Solar ages are
    calculated applying $r$-process fractions as given in
    Table~\ref{rfraction}.\\
$^{b}$~Three independent measurements were obtained for this star which is
the reason why certain chronometer pair/object combinations are listed multiple
times.%\vspace*{-2mm}
\end{table}