\begin{table}%t8 \caption{\label{H2O_frequencies}Line frequencies, upper energy levels and Einstein \mbox{A-coefficients} for the ortho-H$_2$O lines, which will be observed with Herschel/HIFI.} \par %\centering \par \begin{tabular}{ccccc} \hline \hline \noalign{\smallskip} Vibrational & Transition & Frequency & $E_{\rm upper}$ & A \\ state & & [GHz] & [cm$^{-1}$] & [s$^{-1}$]\\ \hline \noalign{\smallskip} $v=0$ & $1_{1,0}{-}1_{0,1}$ & 556.933 & 42.371 & $3.497 \times 10^{-3}$\\ $v=0$ & $5_{3,2}{-}4_{4,1}$ & 620.882 & 50.880 & $1.106 \times10^{-4}$\\ $v=0$ & $3_{1,2}{-}3_{0,3}$ & 1097.488 & 173.365 & $1.664 \times10^{-2}$\\ $v=0$ & $3_{1,2}{-}2_{2,1}$ & 1153.219 & 173.365 & $2.693 \times10^{-3}$ \\ $v=0$ & $6_{3,4}{-}5_{4,1}$ & 1158.391 & 648.967 & $1.417 \times10^{-3}$ \\ $v=0$ & $3_{2,1}{-}3_{1,2}$ & 1162.849 & 212.154 & $2.307 \times10^{-2}$\\ $v=0$ & $8_{5,4}{-}9_{2,7}$ & 1595.961 & 1255.144 & $2.947 \times10^{-4}$ \\ $v=0$ & $3_{0,3}{-}2_{1,2}$ & 1716.731 & 136.757 & $5.109 \times10^{-2}$ \\ $v=0$ & $7_{3,4}{-}7_{2,5}$ & 1797.168 & 842.355 & $9.143\times10^{-2}$ \\ $v=0$ & $5_{3,2}{-}5_{2,3}$ & 1867.562 & 508.806 & $8.198 \times10^{-2}$ \\ \hline \noalign{\smallskip} $v=1$ & $1_{1,0}{-}1_{0,1}$ & 658.081 & 1618.683 & $5.575 \times10^{-3}$\\ $v=1$ & $8_{2,7}{-}7_{3,4}$ & 967.403 & 2495.278 & $5.800 \times10^{-4}$ \\ $v=1$ & $2_{1,2}{-}1_{0,1}$ & 1753.922 & 1677.187 & $6.335 \times10^{-2}$\\ \hline \end{tabular} \end{table}