\begin{table}%t3
\caption{List of GRB~afterglow fluxes extrapolated or interpolated 11 and 12~h after the burst from their spectral and temporal parameters (assuming there is no evolution of these parameters). These two times are chosen to match the works by \citet{dep05} and \citet{ber05} about Beppo-SAX and SWIFT respectively. We have separated the Chandra Grating ({\it top}), Chandra Imaging (\mbox{\it center}) and \mbox{XMM-Newton} ({\it bottom}) samples due to their different observation times, and have removed \object{GRB~030329} due to its very late \mbox{XMM-Newton} observation.}             % title of Table
\label{table_flux}      % is used to refer this table in the text
%\centering
                          % used for centering table
\begin{tabular}{ccc}        % centered columns
\hline\hline                 % inserts double horizontal lines
GRB~Name            & Flux                          &   Flux                    \\ 
                    &  11 h                     &   12 h              \\
                    & (erg cm$^{-2}$ s$^{-1}$)      & (erg cm$^{-2}$ s$^{-1}$) \\
\hline
\object{GRB~020405} & $7.1 \pm 0.3 \times 10^{-12}$ & $6.2 \pm 0.3 \times 10^{-12}$ \\
\object{GRB~020813} & $3.93\pm0.08 \times 10^{-12}$ & $3.48\pm0.07 \times 10^{-12}$ \\
\object{GRB~021004} & $8.4 \pm 0.5 \times 10^{-13}$ & $7.6 \pm 0.4 \times 10^{-13}$ \\
\object{GRB~030328} & $2.9 \pm 0.2 \times 10^{-13}$ & $2.5 \pm 0.2 \times 10^{-13}$ \\
\hline
\object{GRB~000210} & $6.7 \pm 0.3 \times 10^{-13}$ & $6.0 \pm 0.3 \times 10^{-13}$  \\
\object{GRB~000926} & $3.1 \pm 0.2 \times 10^{-12}$ & $2.7 \pm 0.2 \times 10^{-12}$  \\
\object{GRB~011030} & $1.8 \pm 0.5 \times 10^{-11}$ & $1.6 \pm 0.4 \times 10^{-11}$  \\
\object{GRB~030226} & $1.35\pm0.08 \times 10^{-12}$ & $1.10\pm0.07 \times 10^{-12}$ \\
\hline
\object{GRB~001025A}& $1.2 \pm 0.2 \times 10^{-13}$ & $1.1 \pm 0.2 \times 10^{-13}$  \\
\object{GRB~011211} & $1.72\pm0.05 \times 10^{-13}$ & $1.46\pm0.05 \times 10^{-13}$  \\
\object{GRB~020322} & $4.2 \pm 0.1 \times 10^{-13}$ & $3.8 \pm 0.1 \times 10^{-13}$  \\
\object{GRB~031203} & $4.5 \pm 0.1 \times 10^{-13}$ & $4.3 \pm 0.1 \times 10^{-13}$  \\
\object{GRB~040106} & $9.9 \pm 0.2 \times 10^{-13}$ & $9.0 \pm 0.2 \times 10^{-13}$  \\
\object{GRB~040223} & $2.3 \pm 0.2 \times 10^{-13}$ & $2.2 \pm 0.2 \times 10^{-13}$  \\
\object{GRB~040827} & $1.40\pm0.05 \times 10^{-13}$ & $1.26\pm0.05 \times 10^{-13}$  \\
\hline                           
\end{tabular}
\end{table}