\begin{table}%t1
\caption{Line parameters of CH$_2$CHCN, CH$_2$CN, CH$_3$CCH, and
H$_2$CS in IRC~+10216.}\label{table-lineparameters} 
\small%\centerline
 {
\begin{tabular}{ccrrcrrrc}
\hline \hline
\multicolumn{2}{c}{} & \multicolumn{1}{c}{Observed} &\multicolumn{1}{c}{Calculated} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{Line} & \multicolumn{3}{c}{} \\
\multicolumn{1}{c}{Transition} & \multicolumn{1}{c}{Symmetry} & \multicolumn{1}{c}{Frequency} &\multicolumn{1}{c}{Frequency} & \multicolumn{1}{c}{$v_{\rm exp}$$^a$} & \multicolumn{1}{c}{Strength} & \multicolumn{1}{c}{$E_{\rm up}$} & \multicolumn{1}{c}{$\int T_{\rm A}^*$d$v$} & \multicolumn{1}{c}{$\eta_{\rm b}$$^b$} \\
\multicolumn{2}{c}{} & \multicolumn{1}{c}{(MHz)} & \multicolumn{1}{c}{(MHz)} &\multicolumn{1}{c}{(km s$^{-1}$)} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{(K)} & \multicolumn{1}{c}{(K km s$^{-1}$)} & \multicolumn{1}{c}{} \\
\hline
\multicolumn{9}{c}{CH$_2$CHCN} \\
9$_{0,9}$--8$_{0,8}$              &    & 84~946.7(3)   & 84~946.000    & 15.5(10) & 9.00     & 20.4     & 0.11(2)     & 0.82 \\
9$_{1,9}$--8$_{1,8}$              &    & 83~207.5(8)   & 83~207.505    & 14.8(10) & 8.89     & 22.1     & 0.14(2)     & 0.82 \\
9$_{2,7}$--8$_{2,6}$              &    & 85~715.4(5)   & 85~715.424    & 14.5$^d$ & 8.56     & 29.2     & 0.09(3)$^c$ & 0.82 \\
9$_{3,7}$--8$_{3,6}$              &    & 85~427.9(10)  & 85~426.920    & 14.5$^d$ & 8.00     & 40.0     & 0.09(3)$^c$ & 0.82 \\
9$_{3,6}$--8$_{3,5}$              &    & 85~435.6(10)  & 85~434.526    & 14.5$^d$ & 8.00     & 40.0     & 0.07(2)$^c$ & 0.82 \\
10$_{0,10}$--9$_{0,9}$            &    & 94~276.3(10)  & 94~276.634    & 14.5$^d$ & 9.99     & 25.0     & 0.15(3)     & 0.81 \\
10$_{1,10}$--9$_{1,9}$            &    & 92~426.1(15)  & 92~426.248    & 14.5$^d$ & 9.90     & 26.6     & 0.11(3)     & 0.81 \\
10$_{2,9}$--9$_{2,8}$             &    & 94~760.9(7)   & 94~760.781    & 14.5$^d$ & 9.60     & 33.7     & 0.07(2)     & 0.81 \\
10$_{2,8}$--9$_{2,7}$             &    & 95~325.1(8)   & 95~325.474    & 14.5$^d$ & 9.60     & 33.8     & 0.14(3)     & 0.81 \\
10$_{3,8}$--9$_{3,7}$             &    & 94~926.2(15)  & 94~928.606    & 14.5$^d$ & 9.10     & 44.5     & 0.09(3)     & 0.81 \\
10$_{3,7}$--9$_{3,6}$             &    & 94~942.0(10)  & 94~941.630    & 14.5$^d$ & 9.10     & 44.5     & 0.08(2)     & 0.81 \\
10$_{4,7}$--9$_{4,6}$             &    & 94~913.4(10)  & 94~913.115    & 14.5$^d$ & 8.40     & 59.7     & 0.11(3)$^c$ & 0.81 \\
10$_{4,6}$--9$_{4,5}$             &    &              & 94~913.226    &          & 8.40     & 59.7     & $^c$        & 0.81 \\
11$_{1,11}$--10$_{1,10}$          &    & 101~637.1(8)  & 101~637.231   & 14.5$^d$ & 10.9     & 31.5     & 0.07(3)     & 0.80 \\
11$_{2,10}$--10$_{2,9}$           &    & 104~211.5(10) & 104~212.646   & 14.5$^d$ & 10.6     & 38.7     & 0.08(3)     & 0.79 \\
\hline
\multicolumn{9}{c}{CH$_2$CN} \\
4$_{0,4}$--3$_{0,3}$ $J=9$/2--7/2    & O  & 80~480.5(10)  & 80~480.384    & 14.5$^d$ & 4.44     & 9.7      & 0.23(6)$^c$ & 0.82 \\
4$_{0,4}$--3$_{0,3}$ $J=7$/2--5/2    & O  & 80~489.6(10)  & 80~490.261    & 14.5$^d$ & 3.43     & 9.7      & 0.25(6)$^c$ & 0.82 \\
5$_{0,5}$--4$_{0,4}$ $J=11$/2--9/2   & O  & 100~600.2(15) & 100~598.383   & 14.5$^d$ & 5.46     & 14.5     & 0.40(7)$^c$ & 0.80 \\
5$_{0,5}$--4$_{0,4}$ $J=9$/2--7/2    & O  & 100~609.6(15) & 100~608.832   & 14.5$^d$ & 4.44     & 14.5     & 0.33(6)$^c$ & 0.80 \\
5$_{2,4}$--4$_{2,3}$ $J=11$/2--9/2   & O  & 100~633.2(15) & 100~632.957   & 14.5$^d$ & 4.58     & 67.2     & 0.10(3)$^c$ & 0.80 \\
5$_{2,3}$--4$_{2,2}$ $J=9$/2--7/2    & O  & 100~542.5(10) & 100~543.214   & 14.5$^d$ & 3.73     & 67.2     & 0.12(3)     & 0.80 \\
4$_{1,3}$--3$_{1,2}$ $J=7$/2--5/2    & P  & 81~207.6(10)  & 81~206.601    & 14.5$^d$ & 3.22     & 8.9      & 0.09(3)$^c$ & 0.82 \\
4$_{1,3}$--3$_{1,2}$ $J=9$/2--7/2    & P  & 81~232.4(5)   & 81~232.654    & 14.8(5)  & 4.17     & 8.9      & 0.09(2)     & 0.82 \\
5$_{1,5}$--4$_{1,4}$ $J=11$/2--9/2   & P  & 99~689.5(8)   & 99~689.833    & 14.5$^d$ & 5.23     & 13.4     & 0.14(4)     & 0.80 \\
5$_{1,4}$--4$_{1,3}$ $J=11$/2--9/2   & P  & 101~531.6(10) & 101~532.055   & 14.5$^d$ & 5.23     & 13.7     & 0.22(6)     & 0.80 \\
7$_{1,7}$--6$_{1,6}$ $J=13$/2--11/2  & P  & 139~547.1(15) & 139~545.477   & 14.5$^d$ & 6.33     & 25.9     & 0.14(4)     & 0.75 \\
7$_{1,7}$--6$_{1,6}$ $J=15$/2--13/2  & P  & 139~553.4(10) & 139~552.138   & 14.5$^d$ & 7.30     & 25.9     & 0.12(4)     & 0.75 \\
\hline
\multicolumn{9}{c}{CH$_3$CCH} \\
$J_K =5_0$--4$_0$                &    &  85~456.4(10) &  85~457.299   & 14.5$^d$ & 5.00     & 11.5     & 0.12(4)$^c$ & 0.82 \\
$J_K=5_1$--4$_1$                &    &              &  85~455.665   &          & 4.80     & 20.3     & $^c$        & 0.82 \\
$J_K=6_0$--5$_0$                &    & 102~547.5(6)  & 102~547.983   & 14.8(6)  & 6.00     & 17.2     & 0.22(5)$^c$ & 0.80 \\
$J_K=6_1$--5$_1$                &    &              & 102~546.023   &          & 5.83     & 24.4     & $^c$        & 0.80 \\
\hline
\multicolumn{9}{c}{H$_2$CS} \\
3$_{1,3}$--2$_{1,2}$              & O  & 101~478.1(10) & 101~477.750   & 14.5$^d$ & 2.67     & 8.1      & 0.18(4)$^c$ & 0.80 \\
3$_{1,2}$--2$_{1,1}$              & O  & 104~617.5(10) & 104~616.969   & 14.5$^d$ & 2.67     & 8.4      & 0.23(3)     & 0.79 \\
4$_{1,3}$--3$_{1,2}$              & O  & 139~483.8(5)  & 139~483.422   & 14.1(6)  & 3.75     & 15.1     & 0.36(5)     & 0.75 \\
3$_{0,3}$--2$_{0,2}$              & P  & 103~040.3(5)  & 103~040.396   & 14.6(7)  & 3.00     & 9.9      & 0.13(2)     & 0.80 \\
\hline
\end{tabular}}
\medskip
Note. The numbers in parentheses are errors in units of the
last digits; the 1$\sigma$~error in $\int T_{\rm A}^*$d$v$ is derived
from least-squares fits and does not include the calibration
uncertainty of 10\%. $^a$ $v_{\rm exp}$ stands for expansion velocity
and is computed as half the full linewidth at zero level. $^b$
$\eta_{\rm b}$ is $B_{\rm eff}$/$F_{\rm eff}$, i.e. the ratio of $T_{\rm A}^*$
to $T_{\rm mb}$. A superscript~``$c$'' denotes a partly blended line
while ``$d$'' indicates that the linewidth parameter~$v_{\rm exp}$ has
been fixed to 14.5~km~s$^{-1}$. The calculated frequencies of
CH$_2$CN correspond to the strongest hyperfine component, as
measured by \citet{oze04}. CH$_2$CN and H$_2$CS~lines have ortho~(O) or para~(P) symmetry; $E_{\rm up}$ is the energy of the upper level of the transition above the O or P ground state.
\end{table}