\begin{table}%t2
\caption{\label{table:depsys}Systematic effects in the de-projected temperature and density   profiles. Statistical errors are indicated for comparison.}
\par
\small%\centerline
 {
\begin{tabular}{l c c c c}     
\hline\hline                 
\vphantom{\rule{0pt}{3.5mm}}Source of & \multicolumn{2}{c}{Effect on $T_{\rm e}$} & \multicolumn{2}{c}{Effect
  on $n_{\rm e}$} \\
uncertainty & $r_{2500}$ & $r_{500}$ & $r_{2500}$  & $r_{500}$ \\
\hline
\vphantom{\rule{0pt}{4mm}}Primary CMB & $\pm3.7\%$ & $\pm8.7\%$ & $\pm1.1\%$& $\pm3.3\%$ \\
\vphantom{\rule{0pt}{4mm}}Filter function (SZE map) & $+2.1\%$ & $+8.9\%$ & $+0.3\%$ & $+1.4\%$ \\
\vphantom{\rule{0pt}{4mm}}X-ray background & $^{+0.5\%}_{-0.3\%}$ & $^{+2.4\%}_{-3.1\%}$ &
$^{+0.8\%}_{-0.2\%}$ & $^{+1.1\%}_{-0.3\%}$ \\
\vphantom{\rule{0pt}{4mm}}Metal abundance & $^{+2.2\%}_{-1.3\%}$ & $^{+1.5\%}_{-0.2\%}$ &
  $^{+1.9\%}_{-2.8\%}$ & $^{+2.4\%}_{-3.5\%}$ \\
\hline
\vphantom{\rule{0pt}{4mm}}Total systematic$^a$ & $^{+4.8\%}_{-3.9\%}$ & $^{+12.8\%}_{-9.2\%}$ &
$^{+2.4\%}_{-3.0\%}$ & $^{+4.5\%}_{-4.8\%}$  \\
\hline
\vphantom{\rule{0pt}{4mm}}Statistical & $\pm 19.3\%$ & $\pm 43.5\%$ & $\pm 1.1\%$& $\pm 6.0\%$ \\    \hline
\end{tabular}}
\medskip
$^a$ Added in quadrature.
\end{table}