\begin{table}%t6
\caption{\label{SpecRes}Gas production rates for components~C, B and~G.}
\par
\small%\centerline
 {
\begin{tabular}{c c c c c c c c c}
  \hline \hline
  Date & Component & Sky & $Q$(CN) & $Q$(C$_2$) & $Q$(C$_3$) & log [$Q$(C$_2$)/$Q$(CN)] &
  log [$Q$(C$_3$)/$Q$(CN)] & log [${\rm A f} \rho /Q({\rm CN})$]  \\
  \hline
&&&&&&&& \\[-8pt]
  March 4 & C & pp & $1.12 \times 10^{24}$ & --- & $1.64 \times 10^{22}$ & --- &  --1.84 & --21.98\\
  March 25 & B & mc & $4.49 \times 10^{23}$ & --- & --- & --- &  ---  & --22.16\\
  April 11 & B & mc & $3.92 \times 10^{24a}$& $7.59 \times 10^{23a}$ & $4.08 \times 10^{22a}$ &
   --0.71 & --1.98 & --22.27 \\
  April 13 & B & mc & $3.77 \times 10^{24a}$& $2.23 \times 10^{23a}$ & $2.36 \times 10^{22a}$ &
   --1.23 & --2.22 & --22.48 \\
  April 26 & B & pp & $2.66 \times 10^{24}$& $2.99 \times 10^{23}$ & $8.79 \times 10^{21}$ &
   --0.95 & --2.48 & --22.75 \\
  April 29 & G  & pp &$9.68 \times 10^{23}$& --- & --- & --- & --- & ---\\
  May 2 & B & pp & $2.28 \times 10^{24}$& $4.15 \times 10^{23}$ & --- &
   --0.95 & --- & --22.58 \\  
   \hline
\end{tabular}}
\medskip
$^a$ Production rate derived from spectra not acquired under photometric conditions, but mostly clear sky. Whereas these $Q$s could be not realistic, the quotients log~[$Q$(C$_2$)/$Q$(CN)] and log~[$Q$(C$_3$)/$Q$(CN)] are representative of the relative CN, C$_2$ and C$_3$~production rates.
\end{table}