\begin{table}%t7
%\centering
\par
\caption
{SEAM results for the explosion date and distance to SN1999em, under
a variety of choices that highlight uncertainties: bandpass set, 
number of observation dates, reddening, and photospheric velocity values.
Time is relative to JD 2~451~480.54.}
\label{tab_seam}
\begin{tabular}{ccccccc}
\hline\hline
$t_{\rm exp}$ &   $\mu$  &   $d$  & $E_{\it B-V}$ &  $v_{\rm scale}$ & $S$  & $n_{\rm obs}$ \\
(days)&          &  (Mpc) &          &  ($v_{\rm phot}$)&      &               \\
\hline
$-$6.7  &   30.44  & 12.22  &0.10      &     1.0          &   $BV$ &     7 \\
$-$6.9  &   30.44  & 12.26  &0.10      &     1.0          &  $BVI$ &     7 \\
$-$6.8  &   30.41  & 12.10  &0.10      &     1.0          &   $VI$ &     7 \\
\hline
$-$9.5  &   30.94  & 15.45  &0.10      &     1.0          & $BVIZ$ &     4 \\
$-$9.1  &   30.90  & 15.14  &0.10      &     1.0          &   $VZ$ &     4 \\
$-$9.3  &   30.91  & 15.20  &0.10      &     1.0          &  $BVI$ &     4 \\
\hline
$-$6.9  &   30.44  & 12.26  &0.10      &     1.0          &  $BVI$ &     7 \\
$-$6.8  &   30.58  & 13.05  &0.05      &     1.0          &  $BVI$ &     7 \\
$-$6.8  &   30.29  & 11.41  &0.15      &     1.0          &  $BVI$ &     7 \\
\hline
$-$6.9  &   30.44  & 12.26  &0.10      &     1.0          &  $BVI$ &     7 \\
$-$7.0  &   30.66  & 13.57  &0.10      &     1.1          &  $BVI$ &     7 \\
$-$6.9  &   30.21  & 11.02  &0.10      &     0.9          &  $BVI$ &     7 \\
\hline
$-$6.3  &   30.34  & 11.68  &0.10      &     1.0          &   $BV$ &     8 \\
$-$6.2  &   30.30  & 11.51  &0.10      &     1.0          &  $BVI$ &     8 \\
$-$6.0  &   30.25  & 11.22  &0.10      &     1.0          &   $VI$ &     8 \\
\hline
\end{tabular}
\end{table}