\begin{table}%[h!]%t1
%\centering
\par
\caption{\label{maglim}Comparison of CFBDS optical surveys with CFBDSIR.}
\begin{tabular}{llllll}
 \hline\hline
 Survey name&  $z'_{AB}$ $10\sigma$ ($5\sigma$) & Mid-L maximal
  & Mid-T maximal  & T9 maximal  & Final coverage \\ 
 &detection limit& detection (pc) &detection (pc) &detection  (pc) &(sq deg)\\ 
 \hline
 CFBDS:RCS-2            & 22.5 (23.25) &  185 & 80  &16 & 600  \\
 CFBDS:CFHTLS-Very Wide & 22.8 (23.55) & 215 & 90 & 18  & 150  \\
 CFBDS:CFHTLS-Wide      & 23.3 (24.05) & 270 & 115 & 22 & 170  \\
 \hline
 %CFHTLS Deep      & 26.2  &  910 & 450 & 95 & 3.8 to $z'$=26.3\\\hline\hline
 Survey Name&  $J_{\rm vega}$ $10\sigma$ & mid-L maximal
  & mid-T maximal & T9 maximal & Final coverage\\
 &detection limit &detection (pc) &detection (pc)&detection (pc) &(sq deg)\\
  \hline 
  CFBDSIR  & 20.0  & 235 & 145  & 35 & 335 \\
  \hline
\end{tabular}
\tablefoot{CFBDS  initial detections are made in $z'$ and only better than
$10\sigma$ detections are used.  CFBDSIR makes the initial detection in $J$, using only better than
$10\sigma$ detections in $J$, and is only limited in $z'$ by no  detections. We define any $z'$-band object with a signal below the  $5\sigma$ threshold as a no detection or ``$z'$-dropout''.}
\end{table}