\begin{table}%t11
\caption{\label{tab11}Sensitivity of the derived Li~abundances (in~dex) to slight 
changes in the model atmosphere parameters for IRAS 15255$+$1944.}
\small%\centering
\par
\begin{tabular}{ccc}
\hline\hline
Adopted value & Change & Li~abundance\\
\hline
{$T_{\rm eff}$} = 2900~K~& $\Delta${$T_{\rm eff}$} =  $\pm$100~K~&
$\Delta${log $\varepsilon$(Li)} = $\pm$0.3\\
{$Z$} = 0.0 & $\Delta Z = \pm$ 0.3 &$\Delta${log
$\varepsilon$(Li)} = $\pm$0.2\\
{$\xi$} = 3~km~s$^{-1}$&$\Delta${$\xi$} = $\pm$1 km
s$^{-1}$&$\Delta${log $\varepsilon$(Li)} = $\mp$0.1\\
{log $g$} = $-$0.5 & $\Delta${log $g$} = $+$0.5 &$\Delta${log
$\varepsilon$(Li)} = $+$0.1\\
{\it FWHM} = 300 m\AA &$\Delta${\it FWHM} = $\pm$50 m\AA & 
$\Delta$log $\varepsilon$(Li) = $\pm$0.1 \\
\hline
\end{tabular}
\end{table}