\begin{table}%t5
\caption{Spectral index values and $V$ values for all spectra plotted in~Fig.~\ref{spettri_storici}.}
\label{indici_spettrali_V}
%\centering
\small
\begin{tabular}{ccc}
\hline
\hline
Data set & $\alpha$ & $V$ (mJy) \\
\hline
This work (13/5/2005) & 0.77 $\pm$ 0.16 & 16.485 $\pm$ 0.263 \\
This work (19/9/2005) & 0.88 $\pm$ 0.05 & 24.370 $\pm$ 0.238 \\
This work (4/11/2005) & 1.33 $\pm$ 0.10 & 26.884 $\pm$ 0.489 \\
Bertone et~al. (\cite{Bertone00}) & 0.42 $\pm$ 0.26 & 26.20 $\pm$ 0.58 \\
Pesce et~al. (\cite{Pesce97}) & 0.62 $\pm$ 0.30 & 24.50 $\pm$ 0.67  \\
Zhang \& Xie (\cite{Zhang96}) & 0.62 $\pm$ 0.16 & 22.90 $\pm$ 0.63 \\
Bersanelli et~al. (\cite{Bersanelli92}) & 0.61 $\pm$ 0.38 & 51.88 $\pm$ 1.56 ($J$ band) \\
Treves et~al. (\cite{Treves89}) (1/12/1983) & 0.51 $\pm$ 0.31 & 19.80 $\pm$ 0.36 \\
Treves et~al. (\cite{Treves89}) (11/11/1984) & 0.51 $\pm$ 0.41 & 26.20 $\pm$ 0.48 \\
Miller \& McAlister (\cite{Miller83}) & 0.62 $\pm$ 0.56 & 17.8 \\
\hline
\end{tabular}
\end{table}