\begin{table}%t2
\caption{X-ray observations of GRB positions with total {\it SFR} limits $<$$1000~M_{\odot}$/yr.\label{tab:best_obs}}
%\centerline
{\begin{tabular}{@{}lcccc@{}}   
\hline\hline
GRB  &  Flux              & $z$  & Luminosity$^{a}$    & Equivalent massive\\
\multicolumn{3}{c}{($10^{-15}$~erg~cm$^{-2}$~s$^{-1}$)}    &($10^{41}$~erg~s$^{-1}$)     & 
{\it SFR} ($M_{\odot}$/yr)\\
\hline
031203  &  $6$$^{b}$		& 0.1055$^{c}$	&   1.6  & 24\\
030329  &  $3$$^{d}$ 	& 0.1685$^{e}$	&   2.1  & 32\\
980425  &  $7$$^{f}$	& 0.0085$^{g}$	&  0.01  &  0.5\\
\hline
\end{tabular}}
\smallskip
$^{a}$ {Rest frame, 2--10~keV};
$^{b}$ {assuming $\Gamma=1.2$};
$^{c}$ {\cite{2004ApJ...611..200P};}
$^{d}$ {\cite{2004AetA...423..861T};}
$^{e}$ {\cite{2003Natur.423..847H};}
$^{f}$ {afterglow contribution removed;}
$^{g}$ {\cite{1998Natur.395..670G}.}
\end{table}