\begin{table}%t1
\caption{\label{tab:detrate}PACS detections of GOODS-N X-ray sources.}  \vspace*{-2mm}     
\small
%\centering
\par
\begin{tabular}{lcccc}       
\hline\hline    \noalign{\smallskip}        
Class   &Sources&\multicolumn{3}{c}{$>$$3\sigma$ detections at}\\
&&100~$\mu$m&160~$\mu$m&100 or 160~$\mu$m\\
\hline                     
All     & 328& 76& 81& 91\\
Galaxies&  67& 37& 37& 40\\
AGN     & 224& 35& 39& 46\\
Other   &  37&  4&  5&  5\\
\hline                               
\end{tabular}\vspace*{-3mm}  
\end{table}