\begin{table}%t7
\caption{\label{t:astro}Velocity offsets and intrinsic strengths of hyperfine components of the
\dcop, DNC, and HN\thc\ $J=1{-}0$ lines.}
%\centering
\par
\begin{tabular}{llll}
\hline
\hline
\par
Transition       & Component & Offset & Relative \\
                 &           & \kms\  & intensity \\
\hline
\par
\dcop\ $J=1{-}0$  & $F$ = 0--1                    & $+$0.269 & 0.20 \\
                 & $F$ = 2--1                     & $\pm$0.0 & 1.00 \\
                 & $F$ = 1--1                     & $-$0.198 & 0.60 \\
DNC $J=1$--0     & $I,F$ = 2{,}1--2{,}2 / 2{,}1--0{,}0    & $\pm$0.0 & 1.00 \\
                 & $I,F$ = 1{,}1--1{,}1               & $-$0.453 & 0.99 \\
                 & $I,F$ = 2{,}3--2{,}2               & $-$0.689 & 2.33 \\
                 & $I,F$ = 1{,}2--1{,}1               & $-$0.804 & 1.67 \\
      & $I,F$ = 2{,}2--2{,}2 / 0{,}1--0{,}0 / 0{,}1--2{,}2    & $-$1.091 & 2.67 \\
                 & $I,F$ = 1{,}0--1{,}1               & $-$1.279 & 0.33 \\
HN\thc\ $J = 1$--0 & $F_1,F_2,F$ = 0{,}1{,}1--1{,}2{,}2                               & $\pm$0.0 & 1.00 \\
  & $F_1,F_2,F$ = 2{,}2{,}2--1{,}1{,}1 / 2{,}2{,}2--1{,}2{,}2 / 2{,}2{,}1--1{,}1{,}0 / 2{,}2{,}1--1{,}2{,}1 & $-$0.398 & 4.04 \\
  & $F_1,F_2,F$ = 2{,}3{,}3--1{,}2{,}2 / 2{,}3{,}2--1{,}1{,}1 / 2{,}3{,}2--1{,}2{,}1                & $-$0.546 & 6.63 \\
  & $F_1,F_2,F$ = 1{,}1{,}1--1{,}1{,}1 / 1{,}2{,}2--1{,}2{,}1 / 1{,}2{,}2--1{,}2{,}2                & $-$0.725 & 3.66 \\
\hline
\end{tabular}
\end{table}