\begin{table}%t1
\caption{\label{tab:obj}Sample of galaxy clusters, which satisfies the criterion
$R_{\rm S2N}/R_{200} > 0.7$. The columns show: the name of the cluster,
the observation IDs, in which ACIS configuration has been observed,
the exposure time, the adopted X-ray center,
the Galactic absorption from Dickey \& Lockman (\cite{Dickey1990}) in correspondence
of the X-ray center, the redshift, the gas temperature, the mean
local background, $B$, in counts observed in the $0.5$--$5$~keV band, 
and the average distance $D_{\rm B}$ of the regions used
to estimate the local background from the X-ray center.
}
\small
%\centerline
{\begin{tabular}{lccc ccc ccc c}
\hline\hline\noalign{\smallskip}  
Cluster & Obs ID & ACIS & $t_{\rm exp}$ & RA & Dec & $n_{\rm H}$ & $z$ & $kT$ & $B (\times 10^{-3})$ & $D_{\rm B}$ \\
 & & & ks & h m s & degree & $10^{20}$ cm$^{-3}$ & & keV & cts/s/arcmin$^2$ & $R_{200}$ \\ 
\hline 
MS0015.9+1609 & 520      & I & 67.4 & 0 18 33.8 & +16 26 12 & 4.1 & 0.541 & $9.59\pm0.43$ & $1.61\pm0.03$ & $1.35$ \\
MACSJ2228.5+2036 & 3285     & I & 19.9 & 22 28 33.9 & +20 37 15 & 4.6 & 0.412 & $8.25\pm0.59$ & $2.00\pm0.07$ & $0.92$ \\
MACS0744.9+3927 & Merged   & I & 89.0 & 7 44 52.8 & +39 27 26 & 5.7 & 0.686 & $9.58\pm0.67$ & $1.67\pm0.04$ & $1.64$ \\
MACSJ0417.5-1154 & 3270     & I & 11.8 & 4 17 34.6 & $-11$ 54 33 & 3.9 & 0.440 & $10.84\pm0.98$ & $2.33\pm0.10$ & $0.84$ \\
RXJ1701.3+6414 & 547      & I & 49.5 & 17 01 23.8 & +64 14 11 & 2.6 & 0.453 & $4.36\pm0.28$ & $2.25\pm0.05$ & $1.18$ \\
MACSJ1720.2+3536 & 3280     & I & 20.8 & 17 20 16.8 & +35 36 26 & 3.4 & 0.391 & $6.46\pm0.33$ & $1.87\pm0.09$ & $0.91$ \\
RXJ1416.4+4446 & 541      & I & 28.5 & 14 16 27.8 & +44 46 45 & 1.2 & 0.400 & $3.43\pm0.20$ & $2.22\pm0.06$ & $1.38$ \\
MACSJ2129.4-0741 & 3199     & I & 17.6 & 21 29 26.6 & $-7$ 41 29 & 4.8 & 0.570 & $9.17\pm0.90$ & $1.88\pm0.09$ & $1.12$ \\
MACSJ1621.3+3810 & 3254     & I & 9.8 & 16 21 24.9 & +38 10 08 & 1.1 & 0.465 & $6.62\pm0.74$ & $1.58\pm0.10$ & $1.21$ \\
MS0451.6-0305 & 902      & S & 42.6 & 4 54 11.3 & $-3$ 00 56 & 5.0 & 0.540 & $9.11\pm0.45$ & $3.98\pm0.07$ & $0.76$ \\
MACSJ1206.2-0847 & 3277     & I & 23.4 & 12 06 12.1 & $-8$ 48 02 & 3.7 & 0.440 & $11.98\pm0.85$ & $2.07\pm0.06$ & $0.78$ \\
\hline  
\end{tabular}}
\smallskip
\par
\noindent Note: MACSJ0744.9+3927 is the merger of three exposures with 
IDs 3197, 3585, and 6111.
\end{table}