\begin{table}%t2
\par
\caption{\label{massat} Previous black hole mass determinations for
3C~279.}
\small%\centerline
{
\begin{tabular}{llc}
\hline
\hline
$\log(M_{\rm bh}/M_{\odot})$ & Method & Ref.\\
\hline
8.912 & {\it FWHM} (H$_{\beta}) - L_{\rm opt}$ & 1\\
9.099 & {\it FWHM} (H$_{\beta}) - L_{\rm opt}$ & 2\\
8.43  & {\it FWHM} (H$_{\beta}) - L_{\rm opt}$ & 3\\
8.6   & $\gamma$-ray luminosity        & 4\\
8.48  & {\it FWHM} (H$_{\beta}) - L_{\rm opt}$ & 5\\
9.79  & {\it FWHM} (H$_{\beta}) - L_{\rm opt}$ & 6\\
8.28  & {\it FWHM} (H$_{\beta}) - L_{\rm opt}$ & 7\\
 \hline
\end{tabular}}
\smallskip
References: 
(1)~\cite{2001MNRAS.327.1111G}; 
(2)~\cite{2002MNRAS.331..111C};
(3)~\cite{2002ApJ...579..530W};
(4)~\cite{2003MNRAS.340..632L};
(5)~\cite{2004ApJ...615L...9W}; 
(6)~\cite{2004MNRAS.347..607B};
(7)~\cite{2006ApJ...637..669L}.
\end{table}