\begin{table}%t4
\caption{\label{tab_gau1}OCS velocity components from Gaussian fits.}\vspace*{-2mm}
\small%\centering
\par
\begin{tabular}{llllllllll}
\hline 
\hline\noalign{\smallskip}
Species/ & \multicolumn{3}{c}{Ridge} & \multicolumn{3}{c}{Plateau} & \multicolumn{3}{c}{Hot core}\\ 
Transition & $v_{\rm LSR}$ (km s$^{-1}$) & $\Delta v$ (km s$^{-1}$) & $T^*_{\rm A}$ (K) &
$v_{\rm LSR}$ (km~s$^{-1}$) & $\Delta v$ (km s$^{-1}$) & $T^*_{\rm A}$ (K)&
$v_{\rm LSR}$ (km~s$^{-1}$) & $\Delta v$ (km s$^{-1}$) & $T^*_{\rm A}$ (K)\\
\noalign{\smallskip}\hline 
 OCS 7$-$6 & 7.83~$\pm$~0.04 & 5.34~$\pm$~0.09 & 2.30 & 5.9~$\pm$~0.3 &
 26.3~$\pm$~0.6 & 0.49 & 5.6~$\pm$~0.2 & 12.5~$\pm$~0.3 & 1.02\\
 OCS 8$-$7 & 8.00~$\pm$~0.03 & 4.81~$\pm$~0.05 & 3.56 & 6.59~$\pm$~0.07 &
 25.8~$\pm$~0.4 & 0.85 & 5.16~$\pm$~0.04 & 11.7~$\pm$~0.2 & 1.68\\
 OCS 9$-$8 & 7.85~$\pm$~0.02 & 4.75~$\pm$~0.05 & 3.85 & 6.1~$\pm$~0.2 &
 25.8~$\pm$~0.5 & 1.08 & 5.41~$\pm$~0.13 & 11.73~$\pm$~0.06 & 2.29\\
 OCS 11$-$10 & 8.04~$\pm$~0.13 & 4.8~$\pm$~0.3 & 4.36 & 6.76~$\pm$~0.11 &
 25.8~$\pm$~1.2 & 1.80 & 4.5~$\pm$~0.3 & 9.0~$\pm$~0.7 & 2.53\\
 OCS 12$-$11 & 8.13~$\pm$~0.03 & 4.05~$\pm$~0.04 & 6.63 & 6.4~$\pm$~0.2 &
 23.3~$\pm$~0.3 & 3.29 & 5.42~$\pm$~0.08 & 9.49~$\pm$~0.08 & 2.82\\
 OCS 13$-$12 & 7.76~$\pm$~0.07 & 5.1~$\pm$~0.2 & 5.32 & 5.9~$\pm$~0.4 &
 25.8~$\pm$~1.5 & 2.67 & 5.0~$\pm$~0.2 & 9.9~$\pm$~0.8 & 4.16\\
 OCS 14$-$13 & 7.81\tablefootmark{1}~$\pm$~0.06 & 4.6~$\pm$~0.3 & 3.70 &
 ... & ... & ... & ... & ... & ...\\
 OCS 17$-$16 & 8.0~$\pm$~0.2 & 5.8~$\pm$~0.6 & 4.18 & 6.0~$\pm$~0.3 &
 28.6~$\pm$~1.0 & 2.83 & 4.3~$\pm$~0.4 & 8.8~$\pm$~0.3 & 5.83\\
 OCS 18$-$17 & 7.77~$\pm$~0.10 & 5.60~$\pm$~0.15 & 4.47 & 5.7~$\pm$~0.3 &
 25.8~$\pm$~0.8 & 3.06 & 3.71~$\pm$~0.12 & 8.05~$\pm$~0.08 & 4.77\\
 OCS 19$-$18 & 8.0~$\pm$~0.3 & 4.9~$\pm$~0.3 & 3.57 & 5.0~$\pm$~0.3 &
 24.1~$\pm$~1.2 & 4.39 & 4.66~$\pm$~0.14 & 8.1~$\pm$~0.6 & 6.14\\
 OCS 20$-$19 & 7.83~$\pm$~0.12 & 4.8~$\pm$~0.4 & 3.24 & 6.2~$\pm$~0.3 &
 31.2~$\pm$~1.2 & 2.75 & 4.3~$\pm$~0.4 & 10.2~$\pm$~0.6 & 5.10\\
 OCS 21$-$20 & 7.9~$\pm$~0.2 & 6.5~$\pm$~0.3 & 4.68 &
 3.7\tablefootmark{2}~$\pm$~0.8 & 28.0~$\pm$~2.2 & 1.46 &
 3.72~$\pm$~0.09 & 14.0~$\pm$~1.5 & 2.99\tablefootmark{2}\\
 OCS 23$-$22 & 8.1~$\pm$~0.2 & 5.5~$\pm$~0.4 & 4.34 &
 3.2\tablefootmark{2}~$\pm$~0.3 & 21.6~$\pm$~1.3 &
 3.09 & 3.9~$\pm$~0.4 & 7.7~$\pm$~0.9 & 2.62\tablefootmark{2}\\
\hline
\end{tabular}
\tablefoot{$v_{\rm LSR}$, $\Delta v$ and $T^*_{\rm A}$ of the OCS lines shown in Fig.~\ref{fig_lin1} (see text, Sect.~\ref{sect_res_ocs}) derived from three Gaussian fits.\\
\tablefoottext{1}{Due to line overlap only the ridge component can be fitted;} \tablefoottext{2}{although the line is clearly present, the derived
  parameters are biased by the presence of nearby lines from other species.}}\vspace*{-3mm}
\end{table}