\begin{table}%t4
\caption{\label{Tab4}Pre- and late, post-explosion (ground-based and HST) images. The magnitudes of {\it source~A} in the ground-based observations are also reported in Col.~5.}
\small%\centerline
 {
\begin{tabular}{ccccccc}
\hline \hline
Date & JD & Telescope & Filter & Exposure time (s) & {\it Source A} magnitude & Proposal ID / Source \\ 
\hline
1989-12-31 & 2~447~891.53 & SSO 1 m & H$\alpha$ & 3 $\times$ 1000 & & Ryder \& Dopita (\cite{ryd93})\\
1989-12-31 & 2~447~891.57 & SSO 1 m & $R_{\rm c}$ & 2 $\times$ 500 & $>$18.76 & Ryder \& Dopita (\cite{ryd93})\\
1990-03-04 & 2~447~955.45 & SSO 1 m & $V$ & 2 $\times$ 250 & $>$20.70 & Obs. S. Ryder \\
1991-01-11 & 2~448~267.62 & SSO 1 m & $I$ & 2 $\times$ 250 & $>$20.20& Obs. S. Ryder \\
1995-02-22 & 2~449~771.06 & AAT     & unfilt.& 300+60 & 21.85 $\pm$ 0.40$^\ddag$ & Obs. Whiteoak \& Koribalski \\
1995-03-01 & 2~449~777.57 & CTIO 1.5 m & $B$ & 2 $\times$ 600 & 22.76 $\pm$ 0.32 & Obs. G. Purcell \\
1995-03-01 & 2~449~777.58 & CTIO 1.5 m & $I$ & 300 & 21.37 $\pm$ 0.37 &Obs. G. Purcell \\ 
\hline
2006-01-28 & 2~453~764.70 & ESO 2.2 m & H$\alpha$ & 4 $\times$ 720 & & 076.C-0888 (PI: Y. Bialetski)\\
2006-01-29 & 2~453~764.77 & ESO 2.2 m & $V$ & 2 $\times$ 600  & 22.07 $\pm$ 0.09 & 076.C-0888 (PI: Y. Bialetski) \\
2006-01-30 & 2~453~765.73 & ESO 2.2 m & $B$ & 2 $\times$ 300  & 22.89 $\pm$ 0.08 & 076.C-0888 (PI: Y. Bialetski) \\
2006-11-29 & 2~454~068.78 & ESO 2.2 m & $B$ & 4 $\times$ 600  & 22.87 $\pm$ 0.22 & MPI Time (PI: W. Hillebrandt) \\ 
\hline
2006-10-21 & 54~030.31 & HST & $F435W$ & 1580 & & 10~803 (PI: S. Smartt) \\
2006-10-21 & 54~030.37 & HST & $F658N$ & 1350 & & 10~803 (PI: S. Smartt)  \\
2006-10-21 & 54~030.39 & HST & $F814W$ & 1200 & &  10~803 (PI: S. Smartt) \\ 
\hline
\end{tabular}}
\medskip
$^\ddag$~Magnitude from unfiltered image, rescaled to the $R$~band photometry.\\
SSO 1~m~=  1~m-Telescope + CCD (Siding Spring Observatory, Australia); 
AAT~= 4~m Anglo Australian Telescope~+ CCD (Siding Spring Observatory, Australia);  
CTIO~1.5~m~= 1.5~m-Telescope~+ CCD (Cerro Tololo Inter-American Observatory, Chile);
ESO~2.2~m~= ESO/MPI 2.2~m Telescope~+ Wide Field Imager (La~Silla, Chile); 
HST~= Hubble Space Telescope~+ ACS/WFC Camera.
\end{table}