\begin{table}%T8
\caption{Star-formation rates for \vinef\ derived from different spectral regimes.}
\label{tabsfr}
%\centerline
 {
\begin{tabular}{llll} 
\hline\hline
Spectral regime & Luminosity & SF rate & Ref.$^a$\\
 & [erg s$^{-1}$] & [$M_\odot$~yr$^{-1}$] & \\
\hline
\Ha & 2.5~\tento{41} & 2.2 & 1\\
 & & 1.4 & 2\\
FIR & 3.4~\tento{43} & 5.7 & 3\\
X-rays & (1.2--1.8)~\tento{40} & 1.4--2.0 & 4\\
\hline
\end{tabular}
}\smallskip
$^a$ References:\\
\hspace*{2mm}
1) Luminosity: Jackson et~al. (\cite{jac91x});\\
\hspace*{7mm}IMF: \cite{ken83x}.\\
\hspace*{2mm}
2) Luminosity: Jackson et~al. (\cite{jac91x});\\
\hspace*{7mm}IMF: \cite{pog87x}.\\
\hspace*{2mm}
3) Luminosity: \cite{ric88x};\\
\hspace*{7mm}$L_{\rm FIR}$--SFR relation: \cite{thr86x}.\\
\hspace*{2mm}
4) Luminosity: this work;\\
\hspace*{7mm}$L_{\rm X}$--SFR relation: \cite{jun95x}.
\end{table}