\begin{table}%T2
\par
\caption{\label{linepar}Line parameters derived from hyperfine structure fitting 
at position~($-10$,~0). The values refer to spatially
averaged spectra~(26\sec\ beam).}
%\centerline
{
\begin{tabular}{lccccc}
\hline\hline
Line       & $V_{\rm LSR}$   & $\Delta V$  & $\tau$ & $\int T_{{\rm MB}}{\rm d}V ^b$& 
$T_{\rm ex}$ \\
           & km s$^{-1}$ & km s$^{-1}$&        &  K km s$^{-1}$      &  K     \\
\hline
\NTHP~(1$-$0) & 6.472~$\pm$~0.001&0.299~$\pm$~0.001&17.9~$\pm$~0.1&5.859~$\pm$~0.016&4.94~$\pm$~0.03 \\
\NTHP~(3$-$2) & 6.388~$\pm$~0.010$^a$&0.290~$\pm$~0.030& 1.4~$\pm$~1.0&0.692~$\pm$~0.075&5.1~$\pm$~3.7 \\
\NTDP~(2$-$1) & 6.505~$\pm$~0.004&0.268~$\pm$~0.010& 2.2~$\pm$~0.4&0.978~$\pm$~0.026&4.6~$\pm$~0.9 \\
\NTDP~(3$-$2) & 6.507~$\pm$~0.006&0.222~$\pm$~0.024& 1.2~$\pm$~0.9&0.332~$\pm$~0.029&4.1~$\pm$~3.2 \\
\hline
\end{tabular}}
\smallskip
NOTE: $^a$ The \NTHP~(3$-$2) frequency is as in Caselli et~al. (\cite{cas02a}),
whereas for the other lines we used the updated values 
determined by
Dore et~al. (\cite{dcb03}). $^b$ The integration includes all hyperfines. 
\end{table}