\begin{table}%t2
\caption{\label{tb:sfit}Time evolution of the spectral index ($F_\nu \propto \nu^{-\alpha}$). Galactic (but not intrinsic)
extinction has been accounted for by assuming~\mbox{$A_V = \AV$.}}
%\centering
\begin{tabular}{lllll} 
\hline\hline
  UT    & \# & Telescope  & Bands      & $\alpha$      \\ 
 \hline 
  13.28 & A  & Baade 6.5~m & {\it VRI}	  & $1.06\pm0.06$ \\	   
  13.31 & B  & Baade 6.5~m & {\it VRI}	  & $1.00\pm0.05$ \\	   
  13.88 & C  & AZT 1.1~m   & {\it RJK}	  & $0.85\pm0.14$ \\	   
  14.04 & D  & Baade 6.5~m & {\it BVRI}     & $1.15\pm0.05$ \\	    
  15.04 & E  & TNG 3.5~m   & {\it UBVRIJHK} & $1.01\pm0.04$ \\	    
  16.01 & F  & TNG 3.5~m   & {\it BVR}      & $0.72\pm0.22$ \\ 
  \hline 
  All   &-- & --        & --        & $1.04\pm0.03$ \\
   \hline 
\end{tabular}
\end{table}