\begin{table} %t1
%\centering
\par
\caption{\label{table:no1}Results of the fits. SNeIa is only for the supernovae  data,
LZ is for the GRBs data obtained from the Liang-Zhang relation,
GGL for the Ghirlanda et~al. one. } % title of Table
\begin{tabular}{l c c c} 
\hline\hline\\[-3.2mm]
Relation & $w_0$ & $w_a$ & $R^2$ \\ 
\hline 
 SNeIa & $-0.910 \pm 0.070$ & $0.755 \pm 0.054$ & $0.983$ \\
 LZ & $-1.39 \pm 0.38$ & $1.18 \pm 0.37$ & $0.817$ \\
 GGL & $-1.46 \pm 0.38$ & $1.36 \pm 0.32$ & $0.812$ \\
 LZ + SNeIa & $-1.15 \pm 0.10$ & $0.93 \pm 0.11$ & $0.933$ \\
 GGL + SNeIa & $-1.42 \pm 0.12$ & $1.24 \pm 0.13$ & $0.920$ \\
\hline 
\end{tabular}
\end{table}