\begin{table}%t2
\caption{Expected modulation indices for observations of PSR J0437$-$4715.}
\label{modtable}
\small%\centerline
{
\begin{tabular}{ccccccccccc}
\hline\hline
                 &                 &        &Measured&Measured   &Expected   &Expected   &\multicolumn{2}{c}{Expected}                           & \\
Observing &Observing&Scan&Scintillation&Scintillation&Scintillation&Scintillation &\multicolumn{2}{c}{Modulation Index:}                & \\
Frequency&Bandwidth&Time&Bandwidth &Timescale &Bandwidth  &Timescale  &Diffractive &Refractive &Ref. \\
$f$             &$B$          &$T$  &$\Delta\nu_{\rm ISS}$      &$t_{\rm ISS}$        &$\Delta\nu^0$   &$t_{\rm ISS}^0$& $m_{\rm ed}$            &$m_{\rm er}$            & \\
 (MHz)       &(MHz)       &(min)&(MHz)        &(min)         &(MHz)        &(min)          &                                             &                                               & \\
\hline
152  &  1 & 60 &  0.5   & --   & 0.54  & 6.7  & 1  & 1  & 1 \\
327  &  8 & 10 &  2.5  & 5  & 16  & 16.7  & 0.28  & 0.15  & 2 \\
328  & 32 & 44 & 16  & 17  & 16  & 16.7  & 1  & 1  & 3 \\
436  & 32 & 30 & 3.6  & 7.8  & 56  & 23.5  & 0.29  & 0.17  & 4 \\
\hline
\end{tabular}}
\medskip
References: 
(1) Issur (\cite{iss00});
(2) Gothoskar \& Gupta (\cite{got00});
(3) Gwinn et~al. (\cite{paper1}) (Paper~I);
(4) Johnston et~al. (\cite{joh98}).
\end{table}