\begin{table}%T4
\caption{Table of the arc candidates shown in
Fig.\ref{fig:HST_arcs}. "cc'' denotes the cluster centre, the
length-to-width ratio $l/w$ is calculated with the help of
$\lambda_1$, and $\lambda_2$ (the second order moments of the light
distribution) and \rm is measured on the WFPC2 images as it is not
affected by atmospheric blurring. A value of $=$$0.75$ was chosen for
both, the DETECT\_THRESH and ANALYSIS\_THRESH due to the shallowness
of the image. The magnitudes are instrumental WFI magnitudes in the
Vega system. All objects are photometrised using \tt SExtractor's
\rm MAG\_AUTO.\label{tab:arcprops}}
\small%\centering
\par
\begin{tabular}{c|c|c|c|c|c|c|c}
 \hline \hline
Arc candidate & Angular distance  & Projected dist.  & Length $l$ & $l/w$ & \multicolumn{3}{c}{Filter}\\
in Fig. \ref{fig:HST_arcs} & to cc  & to cc [kpc] & [ $\arcsec$ ] & WFPC2  & $B$ [mag] & $V$ [mag] & $R$ [mag]\\
\hline
\tt A1\rm & $\sim$27 & $\sim$117 & 2\myarcsec3 & $5.1$ & $24.49\pm0.28$ & $23.87\pm0.06$ & $22.73\pm0.01$\\ 
\tt A2\rm & $\sim$20 &  $\sim$87 & 2\myarcsec0 & $5.6$ & $23.89\pm0.22$ & $23.07\pm0.04$ & $22.06\pm0.01$\\ 
\tt A3\rm & $\sim$23  & $\sim$100 & 1\myarcsec4 & $2.1$ & $24.20\pm0.21$ & $23.68\pm0.05$ & $22.71\pm0.01$\\ 
\tt A4\rm & $\sim$26  & $\sim$113 & 1\myarcsec1 & $1.9$ & $24.64\pm0.22$ & $24.08\pm0.05$ & $23.64\pm0.02$\\ 
\hline
\end{tabular}
\end{table}