\begin{table}%t1
\caption{\label{tab:parameters}Summary of parameters used for source extraction.}
%\centering
\par
\begin{tabular}{@{}ll}
\hline\hline\noalign{\smallskip}
Parameter& Value    \\
\hline
Pixel scale & 2.34 arcsec  \\ 
Detection threshold & 1.65  \\
Number of pixels required above threshold & 5  \\
Aperture diameter & 7.5 arcsec  \\
Kron factor  & 2.5 arcsec \\
Minimum radius  & 3.5 arcsec \\
magnitude zero point & 23.573\\
\hline
\end{tabular}
\end{table}