\begin{table}%t5 \caption{\label{tab:x}Abell 2345 and Abell 1240 properties.} \small%\centerline { \begin{tabular}{c c c c c c c} \hline\hline Source name & RA & Dec & $z$ & Scale & $F_{\rm X}$ & $L_{\rm X}$ \\ & (J2000) & (J2000) & & (kpc/$''$) & $10^{-12}$ erg/s/cm$^2$ & $10^{44}$ erg/s \\ \hline Abell 2345 & 21 27 11.00 & --12 09 33.0 & 0.1765& 2.957 & 5.3 & 4.3\\ Abell 1240 & 11 23 32.10 & 43 06 32 & 0.1590& 2.715 & 1.3 & 1.0\\ \hline \end{tabular}} \medskip Column~1: source name; Cols.~2,~3: cluster X-ray centre (RA, Dec); Col.~4: cluster redshift; Col.~5: arcsec to kpc conversion scale; Col.~6: flux in the 0.1$-$2.4~keV band (Abell~2345) and in the 0.5$-$2~keV (Abell~1240); Col.~7: X-ray cluster luminosity in the 0.1$-$2.4~keV band (Abell~2345) and in the 0.5$-$2~keV (Abell~1240); data from B\"ohringer et~al. (\cite{Bohr04}) for Abell~2345 and from David et~al. (\cite{Davi99}) for Abell~1240, corrected for the adopted cosmology. \end{table}