\begin{table}%t3
\par
\caption{\label{tab:bands}Detected bands between 700 and 2200~cm$^{-1}$ and identifications.}     %\centerline
 {\begin{tabular}{l c c c c c c }       
\hline\hline      
Wavenumber (cm$^{-1}$) &$T_{\rm form}$ (K)$^{a}$ & $T_{\rm des}$ (K)$^{b}$ & CO & CH$_3$ & OH &Candidates \\
\hline                 % inserts double horizontal lines2135.2489
2135 & 20 & 30 & y &  & &CO \\
1843 & 20 & 30 & y & &  &HCO \\
1746 & 70 & 140--190 & y &  &  y/--&HOCH$_2$CHO + HCOOH + CH$_3$CHO \\
1727 & 20 & 70/110/150 & y &  & &H$_2$CO + CH$_3$CHO + HCOOCH$_3$\\
1498 & 20 & 70 & y &  &  & H$_2$CO\\
1382 & 20 & 140&  & y &  & CH$_3$CH$_2$OH\\
1372 & 30 & 40 &  & y &   & C$_2$H$_6$\\
1350 & 20 & 100 & y & y &  &CH$_3$CHO \\
1301 & 20 & 40 &  & y &  &CH$_4$ \\
1245 & 20 & 70 & y &  &  &H$_2$CO \\
1214 & 70 & 130 & y &  &  &HCOOCH$_3$ \\
1195 & 20 & 50 &  &  &  y & CH$_2$OH \\
1161 & 50 & 90 &  & y &  &CH$_3$OCH$_3$ \\
1093 & 70 & 110/130/180&  &  &  & (CH$_2$OH)$_2$ + CH$_3$OCH$_3$ + CH$_3$CH$_2$OH\\
956 & 30 & 70 &  & y &  & \\
921 & ? & 110 & & y & & CH$_3$OCH$_3$\\
911 & ? & 150 &  &  &  & HCOOCH$_3$ \\
890 & 70 & 180 &  &  & y & (CH$_2$OH)$_2$\\
885 & ? & 130 &  & y & y & CH$_3$CH$_2$OH \\
866 & 70 & 150/180 &  &  & y & (CH$_2$OH)$_2$ (+ HOCH$_2$CHO)$^{c}$ \\
822 & 30 & 50 &  & y & &C$_2$H$_6$\\
\hline
\end{tabular}}
\par
\smallskip
$^{a}$ The temperature at which the band carrier is most efficiently produced.\\
$^{b}$ The temperature at which the band starts to disappear during warm-up with 1~K~min$^{-1}$.\\
$^{c}$ Minor contributor in most experiments.
\end{table}