\begin{table}%T4
\caption{\label{tab:mean}(a) Some averaged correlation coefficients with standard deviations; comparative values from~(b) Canfield \& Mehltretter (\cite{canfield}) and (c) Hanslmeier et~al. (\cite{hanslmeier90}).}
%\centering
\par
\begin{tabular}{lrrr}
\hline\hline
 & (a) & (b) & (c) \\
\hline
$\left\langle I,r_{1}\right\rangle$ & $-0.50\pm0.10$ & 0.019 & 0.52 \\
$\left\langle I,r_{2}\right\rangle$ & $-0.49\pm0.11$ & $-0.190$ & 0.03 \\
$\left\langle I,v_{1}\right\rangle$ & $-0.67\pm0.10$ & $-0.620$ & $-0.56$ \\
$\left\langle I,v_{2}\right\rangle$ & $-0.20\pm0.21$ & $-0.189$ & $-0.18$ \\
$\left\langle r_{2},v_{2}\right\rangle$ & $0.14\pm0.23$ & $-0.016$ & -- \\
$\left\langle v_{1},v_{2}\right\rangle$ & $0.63\pm0.11$ & -- & 0.65 \\
\hline
\end{tabular}
\end{table}