\begin{table}%t5
  \caption{\label{tab:AverSpec}Average spectrum of the sample galaxies
    observed at NTT in arbitrary units and normalized to unity at
    22~000~\AA. The regions with zero rms at the beginning and the end
    are covered only by one or two spectra. The full table is
    only available in the electronic version at the CDS.}
\par
  %\centering
\par
\begin{tabular}{ccc}
\hline
\hline
\\[-3mm]
$\lambda$ (\AA) & $F_\lambda$ & rms \\
\hline
14944 & 2.217 & 0.000 \\
14945 & 2.384 & 0.000 \\
14946 & 2.384 & 0.000 \\
14947 & 2.386 & 0.000 \\
14948 & 2.130 & 0.366 \\
14949 & 2.572 & 0.254 \\
14950 & 2.575 & 0.251 \\
14951 & 2.578 & 0.248 \\
14952 & 2.583 & 0.245 \\
14953 & 2.588 & 0.243 \\
14954 & 2.595 & 0.241 \\
14955 & 2.602 & 0.240 \\
\hline
\end{tabular}
\end{table}