\begin{table}%T3
       \caption{\label{tabch}Measured~CH and~CH$^+$ lines.}
$$ 
         \begin{array}{rrrrrr}
            \hline
            \hline
            \noalign{\smallskip}
\lambda_{\rm hel}& W_\lambda & V_{\rm hel} & N_\infty & 
N_{b=1} &  N_{b=2.4}\\ 
\rm\AA & {\rm m\AA} &
{\rm km\ s^{-1}} 
& 10^{13} {\rm cm}^{-2} & 10^{13} {\rm cm}^{-2} &
10^{13} {\rm cm}^{-2} \\
\par
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
    {\rm BD+67^\circ1585} \\
    4300.063 &       44(10) &      -17.4 &        5.3(1.3) & 10.4^{+8}_{-4} & 7.1^{+3}_{-2}\\
\smallskip
    {\rm BD+67^\circ1598} \\
    4300.077 &       38(5) &      -16.4 &        4.6(0.6) & 7.8(2.0) & 5.8^{+2}_{-1} \\
    4232.359 &       15.5(5) &      -13.3 &        1.8(.6) & 2.3 (1.0)\\
\smallskip
    {\rm BD+66^\circ1661} \\
    4300.034 &       49(5) &      -19.4 &        5.9(0.6) & 13^{+4.5}_{-3} & 8.2^{+5}_{-2.3} \\
    4232.272 &        8.6(5) &      -19.5 &        1.0(0.6) & 1.1(0.7)\\
\smallskip
    {\rm BD+66^\circ1669a}\\
    4300.024 &       62(10) &      -20.1 &        7.5(1.3) & [20] & 11.8^{+8}_{-4} \\
    {\rm BD+66^\circ1669b}\\
    4300: &       {\le}40 &      \ldots &        {\le}4.8 \\
\smallskip
    {\rm BD+66^\circ1673} \\
    4300: &        {\le}6 &      \ldots &        {\le}0.7 & {\le}0.8  & {\le}0.8\\
\smallskip
    {\rm BD+66^\circ1674} \\
    4300.051 &       60(5) &      -18.2 &        7.2(0.6) & [20] & 11.2^{+9}_{-4} \\
    4232.238 &       12(5) &      -21.9 &        1.4(0.6) & 1.7 (0.9) \\
\smallskip
    {\rm BD+66^\circ1675} \\
    4300.041 &       63(5) &      -19.0 &        7.6(0.6 ) & [20] & 12.5^{+8}_{-5} \\
    4232.27  &       10(5) &      -19.5 &        1.2(0.6) & 1.3 (0.9)\\
\smallskip
    {\rm BD+65^\circ1973} \\
    4300: &       {\le}20 &      \ldots &        {\le}2.4 & {\le}3.0 & {\le}3.0 \\
            \noalign{\smallskip}
            \hline
         \end{array}
    ~$$ 
   \end{table}