\begin{table}%t4
%%\centering
\par
\caption{\label{clusterlist}Clusters used to compute the effect of
  $K$-correction on $c_{\rm SB}$.}
\begin{tabular}{llllll}
\hline \hline \noalign{\smallskip}
Cluster  & $z$ & $kT$ (keV)  & $N_{\rm H}/10^{22}$~cm$^{-2}$  & $c_{\rm SB}(0)$\\
\hline  
RXJ1504 & $0.229$ & $4.4{-}9.0$ &  $0.060$  & $0.343$ \\
A1835   & $0.25$  & $3.8{-}10.0$ &  $0.023$  & $0.258$ \\
ZW3146  & 0.291   & $4.0{-}9.0$ &  $0.03$  & $0.210$ \\
A907  &  $0.153$ &  $3.5{-}7.0$ &  $0.054$  & $0.164$ \\
A2029 &  $ 0.078$ &  $5.3{-}8.5$  & $0.030$  & $0.16$ \\
A2163 & $0.203$  & $12.0{-}16.0$  & $0.012$ &  $0.044$ \\
A3266 & $0.0602$ & $7.5{-}11.0$  & $0.0162$ &  $0.059$ \\
A2597 & $0.0803$ & $2.1{-}4.0$ & 0.$025$  & $ 0.363$\\
\hline
\end{tabular}
\end{table}