\begin{table}%t2
%\centering
\par
\caption{Different observations of Abell~1703 used in this work:\protect instrument, filter and exposure time in seconds.}\label{obs}
\small \begin{tabular}{ccc}
\hline\hline
\smallskip
Instrument  &  Filter  &  Exp. time (s) \\
\hline
ACS    & $F435W$ & 7050  \\
ACS    & $F475W$ & 5564  \\
ACS    & $F555W$ & 5564  \\
ACS    & $F625W$ & 8494 \\
ACS    & $F775W$ & 11~128 \\
ACS    & $F850W$ & 17~800 \\
NICMOS  & $F110W$ & 2624 \\
MOIRCS    & $H$ & 18~875 \\
\hline
\end{tabular}
\end{table}