\begin{table}%t1
 \caption{\label{12745tb1}Starting sample of 32 galaxy clusters extracted from the X-ray
 flux limited B55 sample \citep{edge92}. }
\small%\centerline
{ 
\begin{tabular}{lccccccc}
 \hline \hline
Cluster & Obs ID & $z^{a}$ & $N_H^{b}$          &      & Exp.time$^{c}$ &        & $r_{\rm cool}/2$$^{d}$ \\
        &        &                 & 10$^{22}$~cm$^{-2}$ & MOS1 & MOS2                   & {\it pn}& arcmin (kpc) \\
\hline
Abell~85         & 0065140101 & 0.0551 & 0.0342 & 12.5 & 12.5 &  9.7 & 1.137 (73)  \\
Abell~262        & 0109980101 & 0.0163 & 0.0538 & 23.8 & 23.9 & 19.2 & 2.613 (52)  \\
AWM7             & 0135950301 & 0.0172 & 0.0983 & 30.7 & 30.7 & 28.7 & 2.473 (52)  \\
Abell~3112       & 0105660101 & 0.0750 & 0.0261 & 23.3 & 23.3 & 18.6 & 1.124 (96)  \\
Perseus          & 0085110101 & 0.0179 & 0.1410 & 53.7 & 53.7 & 51.3 & 4.263 (93)  \\ 
2A $0335+096$    & 0147800201 & 0.0349 & 0.1780 & 80.2 & 80.9 & 73.9 & ~~2.596 (108) \\
Abell~478        & 0109880101 & 0.0881 & 0.1510 & 28.7 & 79.0 & 42.6 & ~~1.032 (102) \\
Abell~496        & 0135120201 & 0.0329 & 0.0458 & 17.8 & 17.6 & 14.1 & 1.397 (55)  \\
PKS $0745-191$   & 0105870101 & 0.1028 & 0.4240 & 18.9 & 18.9 &  9.8 & ~~0.944 (107) \\
Hydra A          & 0109980301 & 0.0549 & 0.0494 & 18.6 & 19.8 & 15.8 & 1.266 (81)  \\
Abell~1060       & 0206230101 & 0.0126 & 0.0490 & 40.0 & 41.5 & 33.2 & 2.588 (40)  \\
Virgo (M87)      & 0200920101 & 0.0044 & 0.0254 & 77.8 & 79.4 & 70.0 & 9.352 (51)  \\
Centaurus        & 0046340101 & 0.0114 & 0.0806 & 40.7 & 41.3 & 40.3 & 2.928 (41)  \\
Abell~1644       & 0010420201 & 0.0473 & 0.0499 & 15.1 & 15.2 & 12.8 & 0.521 (29)  \\
Abell~1650       & 0093200101 & 0.0838 & 0.0156 & 38.1 & 36.6 & 34.4 & 0.878 (83)  \\
Abell~1651       & 0203020101 & 0.0849 & 0.0181 & 10.2 & 10.8 &  6.9 & 0.669 (64)  \\
Abell~1689       & 0093030101 & 0.1830 & 0.0182 & 37.5 & 37.6 & 32.6 & 0.520 (96)  \\
Abell~3558       & 0107260101 & 0.0480 & 0.0389 & 44.1 & 44.0 & 38.9 & 0.602 (34)  \\
Abell~3562       & 0105261301 & 0.0490 & 0.0385 & 40.3 & 40.2 & 38.0 & 0.834 (48)  \\
Abell~3571       & 0086950201 & 0.0391 & 0.0371 & 24.3 & 24.5 & 16.5 & 1.119 (52)  \\
Abell~1795       & 0097820101 & 0.0625 & 0.0119 & 39.5 & 39.6 & 22.7 & 1.232 (89)  \\
Abell~2029       & 0111270201 & 0.0773 & 0.0304 & 10.7 & 11.2 & 10.3 & 1.059 (93)  \\
Abell~2052       & 0109920101 & 0.0355 & 0.0272 & 30.3 & 30.3 & 26.5 & 1.747 (74)  \\
MKW3s            & 0109930101 & 0.0450 & 0.0303 & 38.7 & 38.3 & 34.1 & 1.620 (86)  \\
Abell~2065       & 0202080201 & 0.0726 & 0.0295 & 20.7 & 20.7 & 16.6 & 0.338 (28)  \\
Abell~2063       & 0200120401 & 0.0349 & 0.0298 &  8.1 &  8.9 &  5.4 & 1.152 (48)  \\
Abell~2199       & 0008030201 & 0.0302 & 0.0086 & 14.6 & 14.6 & 10.0 & 1.985 (72)  \\
Abell~2204       & 0112230301 & 0.1523 & 0.0567 & 19.9 & 20.2 & 13.7 & ~~0.629 (100) \\
Cygnus A         & 0302800101 & 0.0561 & 0.3490 & 22.2 & 22.2 & 20.2 & 1.041 (68)  \\
Abell~2597       & 0147330101 & 0.0852 & 0.0249 & 52.2 & 53.3 & 48.5 & 0.792 (76)  \\
Abell~4038       & 0204460101 & 0.0300 & 0.0155 & 29.4 & 29.2 & 27.6 & 1.859 (67)  \\
Abell~4059$^{e}$ & 0109950101 & 0.0475 & 0.0110 & 12.7 & 13.7 &  7.0 & 1.378 (77)  \\
Abell~4059       & 0109950201 & 0.0475 & 0.0110 & 23.3 & 23.2 & 19.7 & 1.378 (77)  \\
\hline\end{tabular}}
\smallskip
All objects are cool core
 clusters with a mass deposition rate different from zero \citep{peres98}.\\
 Notes: $^{a}$ redshifts taken from the NASA Extragalactic 
Database; $^{b}$ Galactic photoelectric absorption extracted from the HEASARCH Database (LAB survey 
\citealt{kaberla05}); $^{c}$ net exposure times for the three EPIC instruments 
after data cleaning  in ks;  $^{d}$ extraction radius is half the cooling radius from 
\cite{peres98}; $^{e}$ the two observations of Abell~4059 were merged before the spectral 
analysis.  
 \end{table}