\begin{table}%t2
\caption{\label{tabErrBias}Estimation of errors and biases on extinction according to the group of calibration for stars in the 70~pc sphere.}
%\centering
\par
\begin{tabular}{ccc}
\hline \hline \noalign{\smallskip}
Group&Error&Bias\\
  \hline
  1&    0.0044&  --0.0024 \\
  2&    0.0145&  --0.0011\\
  3&    0.0088&  --0.0009\\
  4&    0.0117 &  0.0040 \\
  \hline
\end{tabular}
\end{table}