\begin{table}%t1
%\centering
\par
\caption{\label{table}Frequency, upper level energy, and Einstein coefficient of molecules and lines observed by {\it Herschel}/HIFI towards W3~IRS5. }
\begin{tabular}{lcrcc|rrrrrr}  
\hline \hline\\[-3.5mm] %\noalign{\smallskip}
Mole- & Tran- & Frequency & $E_u$&$A_{\rm ul}$ & Line peak  & Line & Line & Line flux & Absorption & Column \\
cule & sition& & & & $T_{mb}$&width&shift &$\int T_{\rm mb} {\rm d}v$&$\int \tau {\rm d}v$&density \\
& & [GHz]&[K]&[s$^{-1}$]&[mK]&[km~s$^{-1}$]&[km~s$^{-1}$]&[K~km~s$^{-1}$]&[km~s$^{-1}$]&[cm$^{-2}$]\\
\hline %\noalign{\smallskip}
CH&$1_{-1}{-}1_{1}$ &536.7611\tablefootmark{a}& 25.76& 6.4(-4)& 740 $\pm$ 7&10.6 & +1.6 & 14.8 $\pm$ 0.02& &1.3(13) \\
NH&$1_1$-$0_1$  &999.9734\tablefootmark{a}& 47.99& 5.2(-2)&--446 $\pm$ 13 &2.7 &--0.8 &&3.20 $\pm$ 0.02 &4.0(13)\\
SH&3$_{1}$--2$_{-1}$&1447.0123\tablefootmark{a}&640.6& 8.1(-3)& $<$220& & & $<$0.98&&$<$5.0(11) \\
OH$^+$&$1_1{-}0_1$&1033.1186\tablefootmark{a} & 49.58& 1.8(-2)&--790 $\pm$ 21 &5.9  &+34.8&& 14.6 $\pm$ 0.03&7.1(13)  \\
OH$^+$&$2_1{-}1_1$ &1892.2271\tablefootmark{a} & 140.4& 5.9(-2) &$<$255 & & &$<$1.13&  &$<$1.1(11) \\
%NH$^+$&$N_{JP}=1_{\frac{3}{2}+}-1_{\frac{1}{2}-}$ &1012.5400$^d$& 48.59& 5.4(-2)& $<$& & &$<$&  \\
NH$^+$&$1_{\frac{3}{2}-}{-}1_{\frac{1}{2}+}$ & 1019.2107\tablefootmark{d} & 48.91& 5.5(-2)& $<$0.032& & &$<$0.14& &$<$5.2(9) \\
SH$^+$&$1_{2\frac{5}{2}}{-}0_{1{\frac{3}{2}}}$&526.0479\tablefootmark{a}& 25.25& 9.7(-4)&65 $\pm$ 3&4.4 &--0.3 & $0.73 \pm 0.1$ &&4.1(11) \\
SH$^+$&2$_{3\frac{7}{2}}$--1$_{2\frac{5}{2}}$&1082.9117\tablefootmark{a}& 77.2&9.1(-2)&$<$37 &  & &$<$0.17 & &$<$3.9(10)\\
SH$^+$&3$_{4\frac{9}{2}}$--2$_{3\frac{7}{2}}$&1632.5179\tablefootmark{a}& 155.6&3.1(-2)&$<$151 &  & &$<$0.68& &$<$9.8(10) \\
H$_2$O$^+$&$3_{12}{-}3_{03}$&999.8213$^c$& 223.9& 2.3(-2)\tablefootmark{c}& $<$46& & & $<$0.20& &$<$1.7(10)\\
H$_2$O$^+$&$1_{11\frac{3}{2}}{-}0_{00\frac{1}{2}}$ &1115.2040\tablefootmark{b} & 53.52& 3.1(-2)\tablefootmark{c}&--285 $\pm$ 24 &5.1&+39.1& &2.21 $\pm$ 0.03& 4.6(12) \\
H$_3$O$^+$&4$_{30}$--3$_{31}$&1031.2937\tablefootmark{e}&232.2 & 5.1(-3)&570 $\pm$ 10& 6.2&+0.5&3.8 $\pm$ 0.3& &9.7(11) \\
H$_3$O$^+$&4$_{20}$--3$_{21}$ &1069.8266\tablefootmark{e}&268.8&9.8(-3)&230 $\pm$ 10 &4.7 &--0.3 &1.30 $\pm$ 0.03& &2.9(11) \\
H$_3$O$^+$&6$_{21}$--6$_{20}$ &1454.5625\tablefootmark{e}&692.6&7.1(-3)&$<$245&&  & $<$0.66& &$<$3.8(11) \\
H$_3$O$^+$&2$_{11}$--2$_{10}$ &1632.0910\tablefootmark{e}&143.1& 1.7(-2)&145 $\pm$ 46  &6.7&+0.3  &1.20 $\pm$ 0.12& &3.7(11) \\
\hline
\end{tabular}
\tablefoot{The numbers in parentheses give the decimal power. Negative peak fluxes signify background minus line temperature of  lines in absorption. Line widths refer to the FWHP value of the most intense line peak or absorption and its line shift to the systemic velocity of --38.4~km~s$^{-1}$. Non-detected peak fluxes are 5$\sigma$ upper limits at 1~km~s$^{-1}$ resolution, and non-detected line fluxes assume a 5~km~s$^{-1}$ line width. The column densities refer to the upper (emission) or lower (absorption) state.
Molecular data are taken from: \tablefoottext{a}{CDMS (M\"uller et~al. \cite{Muller2001}),} \tablefoottext{b}{M\"urtz et~al. (\cite{Murtz1998}),} \tablefoottext{c}{Bruderer (\cite{Bruderer2006}),} \tablefoottext{d}{H\"ubers et~al. (\cite{Hubers2009}),} \tablefoottext{e}{JPL catalogue.}}
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\end{table}