\begin{table}%t1
  \caption{Results of the fit to the redshift distribution $0 \leq z
    \leq 2.5$, using Eq.~(\ref{nz_power}).  The $1\sigma$~error bars of
    three parameters are shown as well.
 $\langle z  \rangle$ is the mean, $z_{\rm m}$ the median redshift. }
  \label{nzresults}
%\centering
\small
    \begin{tabular}{cc|cc}
      \hline
      \hline
       $a$ &  $0.612 \pm 0.043$  & $A$ &  $1.555$ \\
       $b$ &  $8.125 \pm 0.871$  & $\langle z\rangle$ &  $0.949$ \\
       $c$ &  $0.620 \pm 0.065$  & $z_{\rm m}$ & $0.826$ \\
      \hline
    \end{tabular}
\end{table}