\begin{table}%t1
\caption {Values of cosmological parameters for the fiducial models used in
the Fisher analysis. Note that we impose flatness for all models.
\label{tabletheta}}
%\centering
\par
 \begin{tabular}{l c c c c c c c c}
\hline\hline
Model& $H_0$ & $\Omega_{\rm b}$& $\Omega_{\rm M}$ & $\sigma_{\rm 8}$ &
$ n_{\rm s}$ & $w_0$ & $w_{\rm a}$& $a_{\rm t}$ \\ 
\hline
 A1&  73& 0.04& 0.24 & 0.74 & 0.951&  --1  & -- & -- \\ 
 A2&  73& 0.04& 0.24 & 0.74 & 0.951&  --0.9  & -- & -- \\ 
 B &  73& 0.04& 0.24 & 0.74 & 0.951&  --0.9  & 0.1 & -- \\ 
 C &  73& 0.04& 0.24 & 0.74 & 0.951&  --  & -- & 0.5 \\ 
\hline
\end{tabular} 
\end{table}