\begin{table}%tC.2
% \setcounter{\tabcolsep}{20pt}
\caption{\label{tab:pnfws}Best fitting GNFW parameters for the average pressure profile of the \rexcess\ sub-samples of cool core and morphologically disturbed clusters  (Eq.~(\ref{eq:pgnfw})).}
%\centering
\par
\begin{tabular}{lccccccccccc}
\hline \hline \noalign{\smallskip}
    Sub-sample &   $P_0$&$c_{500}$ & $\alpha$ & $\gamma$ \\
      \hline
Cool-core & $ 3.249$ & $1.128$ & $1.2223$ & $0.7736$ \\
Morphologically disturbed& $3.202$ & $1.083$ & $1.4063$ & $0.3798$  \\
\hline
\end{tabular}
\tablefoot {The external slope parameter~$\beta$ has been fixed to~$5.49$.}
\end{table}