\begin{table}%T7
\caption{ The mean peak wavelength $\lambda_0$, {\it FWHM} and
peak-over-continuum flux ratio of the detected
features. \label{PAHtable}}
%\centering
\par
\begin{tabular}{cccc}
 \hline\hline
 \multicolumn{1}{c}{Feature} &
 \multicolumn{1}{c}{$\langle \lambda_0 \rangle$} &
 \multicolumn{1}{c}{$\langle {\it FWHM} \rangle$} &
 \multicolumn{1}{c}{$\langle {\rm PF/CF} \rangle$} \\ 
             & [$\mu$m]&[$\mu$m]&     \\
\hline
PAH 3.3~micron & 3.293 & 0.045 & 1.172 \\
NAN 3.4~micron & 3.415 & 0.067 & 1.284 \\ 
NAN 3.5~micron & 3.530 & 0.059 & 1.542 \\
PAH 6.2~micron & 6.261 & 0.198 & 1.690 \\
PAH 7.7~micron & 7.837 & 0.551 & 1.575 \\
PAH 8.6~micron & 8.641 & 0.311 & 1.310 \\
COMP 11~micron & 11.254& 0.326 & 1.329 \\
Si 9.7~micron  & 9.959 & 2.775 & 1.909 \\
\hline
\end{tabular}
\end{table}