\begin{table}%t3
%\centering
\par
\caption{Physical parameters at selected positions in Fig~\ref{intenoverlay}, obtained by fitting the observed intensity ratios to the {\bf single clump} KOSMA -- $\tau$ PDR models.
Cols.~(2)--(5) list the fitted clump densities, clump mass, clump radius and FUV field; Col.~(6) is the minimum reduced $\chi^{2}$ of the PDR fit; the FUV field derived from the FIR
continuum $\chi_{\rm FIR}$ and that from the stellar radiation $\chi_{\rm star}$ are in Cols.~(7) and (8); The distance to HD~281159 used for the calculation of $\chi_{\rm star}$is
listed in Col.~(9).}\label{pdrtable}    
\begin{tabular}{lccccrrcc}
\hline\hline\noalign{\smallskip}
Position & $n$ & $M_{\rm cl}$ & $R_{\rm cl}$ & $\chi_{\rm PDR}$& $\chi^{2}_{\min}$ & $\chi_{\rm FIR}$ & $\chi_{\rm star}$ & $d$   \\    & [10$^{5}$~cm$^{-3}$]   & $M_{\odot}$     & pc &  &  &  & & pc    \\
\hline      
Northern rim                             & 1.91                  & 0.2             & 0.01              & 15                 & 1.38             & 39                  &  40                  & 0.37  \\
Cluster                                  & 2.75                  & 0.1             & 0.01              & 98                 & 1.05             & 84                  &  40                  & 0.37  \\
Ridge                                    & 4.25                  & 0.4             & 0.01              & 38                 & 1.23             & 46                  &  40                  & 0.37  \\
Map center                               & 3.98                  & 0.1             & 0.01              & 23                 & 1.04             & 23                  &  13                  & 0.64  \\
$[\ion{C}{i}]$ peak                      & 1.91                  & 0.1             & 0.02              & 23                 & 1.96             & 11                  &   7                  & 0.90  \\
Western rim                              & 0.63                  & 0.2             & 0.02              & 20                 & 2.00             &  6                  &   3                  & 1.42  \\
Southern rim                             & 0.44                  & 0.4             & 0.02              &  2                 & 2.31             &  1                  &   3                  & 1.29  \\
\hline                                   
\end{tabular}
\end{table}