\begin{table*}%t2
%\centering
\par
  \caption{Spectroscopic constants determined for the ground, $v_9=1$, $v_{10}=1$, and
             $v_{11}=1$ fundamental bending states of HC$_5$N.
             Standard errors in units of the last digit are given in parentheses for the fitted
             parameters.\label{tab:ses}}
$$
  \begin{tabular}{lcD{.}{.}{8}D{.}{.}{8}D{.}{.}{8}D{.}{.}{8}}
    \hline\hline  \\[-1ex]%[-3ex]
                &               & \multicolumn{1}{c}{{Ground state}$^\mathit{a}$} &
                                  \multicolumn{1}{c}{$v_{11}=1$} &
                                  \multicolumn{1}{c}{$v_{10}=1$} &
                                  \multicolumn{1}{c}{$v_9=1$} \\[1ex]
    \hline  \\[-1ex]%[-3ex]
    $B$             &  (MHz)  &  1331.332687(20)   &  1334.118237(24)  &  1333.784785(26) & 1332.925330(20)  \\%[-1ex]
    $\alpha$        &  (MHz)  &                    &    -2.786         &    -2.452        &    -1.593        \\%[-1ex]
    $D$             &  (Hz)   &    30.1090(15)     &    31.6522(17)    &    30.7624(19)   &    30.4337(14)   \\%[-1ex]
    $H$             &($\mu$Hz)&     1.635(29)      &     1.635^b       &     1.635^b      &     1.635^b      \\%[-1ex]
    $d_{JL(11,11)}$ &  (kHz)  &                    &    -3.3047^b      &                  &                  \\%[-1ex]
    $q_t$           &  (MHz)  &                    &     1.162898(48)  &     0.500190(52) &     0.328526(40) \\%[-1ex]
    $q_{tJ}$        &  (Hz)   &                    &    -1.0629(34)    &    -0.1734(37)   &    -0.0393(28)   \\%[-1ex]
    $\sigma_{\rm fit}$  &  (kHz)  &     7.2            &    14.6           &    10.6          &     8.2          \\%[-1ex]
    No. of lines    &         &      46            &      98           &      64          &      65          \\%[-1ex]
    $J$ range       &         &  \multicolumn{1}{c}{9--171}  &
                                 \multicolumn{1}{c}{8--100}  &
                                 \multicolumn{1}{c}{10--100} &
                                 \multicolumn{1}{c}{10--100} \\[1ex]
\hline
  \end{tabular}
  $$
  \begin{list}{}{}
    \item[$^a$] From \citet{Bizzo04}.
    \item[$^b$] Fixed in the analysis.
  \end{list}
  \end{table*}