\begin{table}%t1
\caption{\label{pho}Results of aperture photometry on the TNG imaging frames.}
%\centering
\par
\begin{tabular}{l c c }
\hline\hline
\noalign{\smallskip}
Date               & $R$\tablefootmark{a} & $F_{\rm R}$\tablefootmark{b}    \\
                   & [mag]       & [$10^{-15} \rm ~ erg ~ cm^{-2} ~ s^{-1} ~ \AA^{-1}$] \\
\hline
2007 Jul. 10--11    & $14.46 \pm 0.01$ & $3.16 \pm 0.01$ \\
2007 Sep. 7         & $14.21 \pm 0.02$ & $4.12 \pm 0.09$ \\
2007 Oct. 10        & $13.79 \pm 0.01$ & $6.31 \pm 0.05$ \\
2008 Jan. 8         & $14.13 \pm 0.03$ & $4.42 \pm 0.11$ \\
\hline
\end{tabular}
\tablefoot{\tablefoottext{a}{$R$-band magnitudes obtained from photometry with $8 \arcsec$ aperture radius;}
\tablefoottext{b}{flux densities at $6410 ~ \AA$ derived from photometry with $2 \arcsec$ aperture radius, used to normalise the spectra.}}
\end{table}