\begin{table}%t8
\par
  \caption {\label{byfitparam}The derived coefficients for the theoretical calibration in the intervalls
    I: $0.15 \leq (b-y) \leq 0.424$,  II: $0.424 \leq (b-y) \leq 0.712$ \&
       $-5.0 \leq  \rm  [Me/H]  \leq -0.5$ and III: $0.428 \leq (b-y) \leq 0.794$ \&
       $-0.5 <  \rm  [Me/H]  \leq 0.5$.}
 \begin{tabular}{ccccccc}
  \hline \hline
       &  $a_{0}$        &  $a_{1}$ &  $a_{2}$ &  $a_{3}$  &  $a_{4}$  &  
       $a_{5}$      \\
         \hline                                                                      
   I:  &  0.6732         &   0.0859 & 1.1455  & --1.080e-2 & --0.132e-2 & --0.082e-2    \\
       &                 &          &         &           &           &              \\
   II: &  0.1983         & 2.0931   & --0.9978 & 4.709e-2  & --2.66e-2  & --0.104e-2      \\
       &                 &          &         &           &           &              \\
  III: &  0.4522         & 1.1745   & --0.3093 & --0.1693   &  2.165e-2 & --1.679e-2    \\
     \hline
  \end{tabular}
 \end{table}