\begin{table}%T2
\caption{\label{table2}Characteristics of the sources. Fluxes and luminosities have been derived from XMM-Newton slew observations.}             
\small     
%\centering
\par
\begin{tabular}{c c c c }        
\hline\hline   
 {Source name} &  {Redshift}  &  {$F_{\rm 0.2{-}2~keV}$} & {$L_{\rm 0.2{-}2~keV}$}  \\ 
& &[erg s$^{-1}$ cm$^{-2}$] & [erg s$^{-1}$]\\
\hline  \noalign{\smallskip}                      
   NGC 3599 & 0.0028 & $7.1\times10^{-12}$ & $1.22\times10^{41}$ \\ 
   SDSS J132341.97+482701.3 & 0.0875 & $2.3\times10^{-12}$ & $4.39\times10^{43}$\\    
   SDSS J093922.90+370944.0 & 0.1845 & $2.7\times10^{-12}$ & $2.63\times10^{44}$\\   
   2MASX J02030314$-$0741514 &  0.0615 & $3.1\times10^{-12}$ & $2.82\times10^{43}$\\
   2MASX J02491731$-$0412521 & 0.0186 & $2.7\times10^{-12}$ & $2.07\times10^{42}$\\
\hline                                   
\end{tabular}
\end{table}