\begin{table}%t2
\par
\caption {\label{tab_opacmol}Data sources for the  atomic and molecular monochromatic absorption coefficients.
} 
%\centerline
 {\begin{tabular}{ccl}
\hline
\hline
\multicolumn{2}{c}{Species} & Source \& Reference \\
\hline
\multirow{5}*{Atoms} & {C, N, O} &  \\
& { Ne, Na, Mg} & \\
& {Al, Si, S} &  OP: Seaton (\cite{Seaton05})   for $\log(T) \ge 3.6$\\
& {Ar, Ca, Cr} &  \\
& {Mn, Fe, Ni} & \\
\multirow{3}*{Atoms} & \multirow{1}*{CI, NI} &  Method as in Kurucz (\cite{Kurucz70}) based on\\
&    {OI, MgI} & Peach (1970) and Henry (1970)\\
&{AlI, SiI} & for $\log(T) < 3.6$\\
\multirow{20}*{Molecules} &  HF & LL: Uttenthaler et~al. (\cite{Uttenthaler08}) \\
 &HCl & LL: Rothman et~al. (\cite{Rothman05})\\
 &CH & LL: J\o rgensen (\cite{Jorgensen97})\\ 
 &C$_2$ & LL: Querci et~al. (\cite{Querci74}) \\
 &CN &  LL: J\o rgensen (\cite{Jorgensen97})\\
 &CO &  LL: Goorvitch \& Chackerian (\cite{Goorvitch94}) \\
 &OH &  LL: Schwenke (1997, priv. comm.) \\
 &SiO &  LL: Rothman et~al. (\cite{Rothman05})\\
 &TiO &  LL: Schwenke (\cite{Schwenke98}) \\
 &VO &  LL: Alvarez \& Plez (\cite{Alvarez98}) \\
 &CrH & LL: Bauschlicher et~al. (\cite{Bauschlicher01})\\
 &FeH & LL: Dulick et~al. (\cite{Dulick03}) \\
 &YO & LL: Littleton (2007, priv. comm.) (2001) \\
 &ZrO & LL: Plez (2007, priv. comm.) \\ 
 &H$_2$O & LL: Barber et~al. (\cite{Barber06}) \\
 &HCN & LL: Harris et~al. (2003) \\
 &C$_3$ &  OS: J\o rgensen et~al. (\cite{Jorgensen89}) \\
 &CO$_2$ & LL: Rothman et~al. (1995) \\
 &SO$_2$ &  LL: Rothman et~al. (\cite{Rothman05})\\
 &C$_2$H$_2$ &  OS: J\o rgensen (\cite{Jorgensen97}) \\
\hline
\end{tabular}}
\smallskip
Atomic absorption coefficients (including both continuum and discrete
opacities) are  
from the Opacity Project (OP) database, while molecular absorption
coefficients are extracted from either line lists (LL) or opacity
sampling (OS) data.
\end{table}