\begin{table}%t1
\caption{\label{tab:pars}Basic X-ray parameters of \xspt\ and \xsptt.}
%\centering
\par
\begin{tabular}{ l l l l}
\hline\hline\noalign{\smallskip}
Parameter & \xspt & \xsptt & Units\\
\hline
 $\alpha$ (J2000)\tablefootmark{a} & ~~~~$23^{{\rm h}}32^{{\rm m}}26.7^{{\rm s}}$ & ~~~~$23^{{\rm h}}42^{{\rm m}}45.8^{{\rm s}}$ \\
 $\delta$ (J2000)\tablefootmark{a} & $-53\degr58\arcmin20.4\arcsec$& $-54\degr10\arcmin59.2\arcsec$   \\
photometric redshift & $0.32$\tablefootmark{b} & $1.08$\tablefootmark{b} &\\
$F_{500}  $ [0.5--2.0 keV] & $9.52 \pm 0.51 $ & $0.58 \pm 0.06 $ & $10^{-13}$ erg cm$^{-2}$ s$^{-1}$ \\
$L_{500}  $ [0.5--2.0 keV] & $2.71 \pm 0.15 $ & $2.86 \pm 0.29 $ & $ 10^{44}$ erg s$^{-1}$           \\
$T_{500}  $ & $9.3 \pm 2.6$\tablefootmark{c} & $4.5 \pm 1.3$\tablefootmark{f} & $ $ keV \\
$r_{500}  $ & $1.3 \pm 0.2$\tablefootmark{d}& $0.6 \pm 0.1$\tablefootmark{d} & $ $ Mpc \\
$M_{500}  $ & $8.8 \pm 3.8 $\tablefootmark{d} & $1.9 \pm 0.8$\tablefootmark{d} &    $ 10^{14}~M_{\sun}$ \\
$Y_{{\rm X},500}$ & $11.6 \pm 9.7$\tablefootmark{e} & $1.1 \pm 0.7$\tablefootmark{g} & $ 10^{14}~M_{\sun}$ keV \\
$r_{200}  $ & $2.0 \pm 0.3$\tablefootmark{d} & $0.9\pm0.1$\tablefootmark{d} & $ $ Mpc \\
$M_{200}  $ & $12.4 \pm 5.4 $\tablefootmark{d} & $2.7 \pm 1.2 $\tablefootmark{d} & $ 10^{14}~M_{\sun}$ \\
\hline
\end{tabular}
\tablefoot{Flux and luminosity errors
 include the Poisson errors and a 5\% systematic error in the background estimation.
 Errors of parameters obtained from scaling relations include
the measurement errors of the luminosity and temperature, respectively, and the
 intrinsic scatter of the scaling relations. We assume self-similar evolution
for all the scaling relations and no evolution of their intrinsic scatters (see
Sect.~\ref{sec:xspec}). 
\tablefoottext{a}{{X-ray} coordinates based on a maximum-likelihood fit of a PSF-folded
 beta model to the surface brightness distribution;}
 \tablefoottext{b}{\citet{high10};}
\tablefoottext{c}{spectroscopic temperature (Sect.~\ref{sec:xspec}), error bars averaged, assuming isothermality;}
\tablefoottext{d}{$M{-}T$ relation from \citet{arnaud05}, using relations for $T~>3.5$~keV,
self-similar evolution, radii calculated analytically from the mass estimates;}
\tablefoottext{e}{$M_{500}{-}Y_{{\rm X}}$ relation \citep{arnaud07}.}
\tablefoottext{f}{$L{-}T$ relation from \citet{pratt09}, self-similar evolution, relation for the 0.5--2~keV
 luminosity, BCES orthogonal fit;}
\tablefoottext{g}{$L{-}Y_{{\rm X}}$ relation from \citet{pratt09}, self-similar evolution,
relation for the 0.5--2~keV luminosity, BCES orthogonal fit. $Y_{X}$, the X-ray analogue
 to the Comptonization parameter $Y$, is the product of the gas mass and temperature
 \citep[e.g.][]{kravtsov06}.} } 
\end{table}