\begin{table} %tb2
\caption{\label{tab_hcs+lines}HCS$^+$ Observed line parameters. }
\small%\centering
\par
\begin{tabular}{lllllll}
\hline
\hline \noalign{\smallskip}
Observed & $T^*_{\rm A}$ & $\int T^*_{\rm A} {\rm d}v$ & Transition & Rest & $E_{\rm up}$ &
$S_{ij}$\\
$v_{\rm LSR}$ (km s$^{-1}$) & (K) & (K~km~s$^{-1}$) & $J$ & frequency (MHz) &
(K) &  \\
\hline
7.7 & 0.13 & ... & 2$-$1 & 85~347.875 & 6.1 & 2.00 \\
8.8 & 0.90 & ... & 4$-$3 & 170~691.620 & 20.5 & 4.00 \\
8.9 & 0.74 & 9.2~$\pm$~0.3 & 5$-$4 & 213~360.654 & 30.7 & 5.00 \\
8.7 & 0.65 & 4.3~$\pm$~0.4 & 6$-$5 & 256~027.107 & 43.0 & 6.00 \\
\hline
\end{tabular}
\tablefoot{Observed HCS$^+$ lines in the frequency range of the Orion KL
  survey. Column~1
gives the observed (centroid) radial velocities, Col.~2 the
peak line temperature, Col.~3 the integrated line intensity, Col.~4 the quantum numbers, Col.~5 the
assumed rest frequencies, Col.~6 the energy of the upper level, and
Col.~7 the line strength.}
\end{table}