\begin{table}%T4
\caption{\label{sepa}Projected separation of the main IRS~13E sources. From the
astrometry the precision on the distance betwen two sources is~$\pm$15~AU.}
      %\centering
\par
        \begin{tabular}{ l  | c | c } 
\hline\hline
~~~Sources & Ang. sep. & Distance (AU) \\
\hline 
  ~~E1$-$E2 & 0.241\arcsec & 1930 \\
  ~~E1$-$E4 & 0.330\arcsec & 2630 \\
  ~~E2$-$E4 & 0.327\arcsec & 2600 \\ 
  ~~E2$-$E3A & 0.200\arcsec & 1600 \\
  E3A$-$E3B & 0.073\arcsec & ~590 \\
\hline
        \end{tabular}
        \end{table}