\begin{table}%t1 \caption{\label{t1}Peak position and assignments for irradiated CO; $A$ is the corresponding band strength.} %\centering \par \begin{tabular}{l l l l l} \hline \hline\noalign{\smallskip} Position (cm$^{-1}$) & Molecule & Assignment & $A$ ($10^{-17}$ cm/molecule) & Reference \\ \hline 4694 & ? & & & \\ 4252 & CO & 2$\nu_{1}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 3707 & CO$_{2}$ & $\nu_{1} + \nu_{3}$ & & Gerakines et~al. (\cite{Gerakines1995}) \\ 3602 & CO$_{2}$ & 2$\nu_{2} + \nu_{3}$ & & Gerakines et~al. (\cite{Gerakines1995}) \\ 3070 & C$_{3}$O$_{2}$ & $\nu_{2} + \nu_{3}$ & & Gerakines \& Moore (\cite{Gerakines2001}) \\ 2399 & C$_{3}$O$_{2}$ & $\nu_{2} + \nu_{4}$ & & Gerakines \& Moore (\cite{Gerakines2001}) \\ 2346 & CO$_{2}$ & $\nu_{3}$ & 7.6 & Yamada \& Person (\cite{Yamada1964}) \\ 2330 & OC$^{18}$O & $\nu_{3}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 2281 & $^{13}$CO$_{2}$ & $\nu_{3}$ & & Gerakines et~al. (\cite{Gerakines1995}) \\ 2257 & C$_{5}$O & & & Dibben et~al. (\cite{Dibben2000}) \\ 2247 & C$_{3}$O & $\nu_{1}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 2242 & C$_{3}$O$_{2}$ & $\nu_{3}$ & 13 & Gerakines \& Moore (\cite{Gerakines2001}) \\ 2209 & CO & $\nu_{1} + \nu_{L}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 2193 & C$_{3}$O$_{2}$ & $\nu_{1}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 2139 & CO & $\nu_{1}$ & 1.1 & Jiang et~al. (\cite{Jiang1975}) \\ 2123 & C$_{4}$O$_{2}$ or C$_{7}$O$_{2}$& $\nu_{2}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 2112 & C$^{17}$O & $\nu_{1}$ & & Palumbo et~al. (\cite{Palumbo2008}) \\ 2107 & C$_{5}$O and O$_{3}$ & $\nu_{2}$; $\nu_{1}$ + $\nu_{3}$ & & Jamieson et~al. (\cite{Jamieson2006}); Bennet \& Kaiser (\cite{Bennet2005}) \\ 2092 & $^{13}$CO & $\nu_{1}$ & & Gerakines et~al. (\cite{Gerakines1995}) \\ 2088 & C$^{18}$O & $\nu_{1}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 2074 & ? & & & Freivogel et~al. (1996) \\ 2071 & ? & & & \\ 2070 & ? & & & \\ 2065 & ? & & & Szczepanski et~al. (\cite{Szczepanski1996}) \\ 2060 & C$_{5}$O$_{2}$ & $\nu_{3}$ & 7.4 & Jamieson et~al. (\cite{Jamieson2006}) \\ 2039 & C$_{3}$ & $\nu_{3}$ & 13 & Jamieson et~al. (\cite{Jamieson2006}) \\ 2019 & ? & & & \\ 1989 & C$_{2}$O & $\nu_{1}$ & 2.4 & Jamieson et~al. (\cite{Jamieson2006}) \\ 1950 & C$_{6}$ & & & Trottier \& Brooks \\ 1915 & C$_{4}$O & $\nu_{2}$ & & Jamieson et~al. (\cite{Jamieson2006}) \\ 1874 & ? & & & \\ 1859 & ? & & & \\ 1817 & C$_{5}$O & $\nu_{3}$ & 6.2 & Jamieson et~al. (\cite{Jamieson2006}) \\ 1303 & ? & & & \\ 1041 & O$_{3}$ & & 1.53 & Bennet \& Kaiser (\cite{Bennet2005}) \\ 879 & ? & & & \\ 659 & CO$_{2}$ & $\nu_{2}$ & & \\ \hline \end{tabular} \end{table}