\begin{table}%t4
%\centering
\par
\caption{Semi-major axis and eccentricity variation ranges for the 3~known planet of \gl, plus additional outer planets (see text), 
  computed over $10^5~$yr integrations.
\label{addpla}}
\begin{tabular}{@{\excs}lll}
\hline\hline\noalign{\smallskip}
Planet & Semi-major axis (AU) & Eccentricity\\
\noalign{\smallskip}\hline\noalign{\smallskip}
\multicolumn{3}{l}{With a $1~M_{\rm J}$ planet at 5~AU:}\\
\noalign{\smallskip}
\gl~b & 0.04060120--0.04061199 & 0.00367502--0.0895939\\
\gl~c & 0.07286312--0.0729903  & 0.09259277--0.164875\\
\gl~d & 0.25222823--0.25281971  & 0.11884516--0.1228305\\
\noalign{\smallskip}\hline\noalign{\smallskip}
\multicolumn{3}{l}{With a $29.6~M_\oplus$ planet at 5~AU:}\\
\noalign{\smallskip}
\gl~b & 0.04060139--0.04061188 & 0.00347993--0.0895106\\
\gl~c & 0.07286522--0.0729892  & 0.09258738--0.1647922\\
\gl~d & 0.25222915--0.2528203  & 0.11887163--0.1226443\\
\noalign{\smallskip}\hline\noalign{\smallskip}
\multicolumn{3}{l}{With a $26.5~M_\oplus$ planet at 4~AU:}\\
\noalign{\smallskip}
\gl~b & 0.04060141--0.04061174 & 0.00354749--0.08949917\\
\gl~c & 0.07286447--0.07298892 & 0.09258812--0.16479787\\
\gl~d & 0.25222689--0.25282013 & 0.11884819--0.1226468\\
\noalign{\smallskip}\hline\noalign{\smallskip}
\multicolumn{3}{l}{With a $22.9~M_\oplus$ planet at 3~AU:}\\
\noalign{\smallskip}
\gl~b & 0.04060137--0.04061170 & 0.00372438--0.0895144\\
\gl~c & 0.07286369--0.07298806 & 0.09258945--0.16479738\\
\gl~d & 0.25222659--0.25281951 & 0.11884226--0.12267108\\
\noalign{\smallskip}\hline\noalign{\smallskip}
\multicolumn{3}{l}{With a $18.7~M_\oplus$ planet at 2~AU:}\\
\noalign{\smallskip}
\gl~b & 0.04060140--0.04061177 & 0.00405747--0.08955927\\
\gl~c & 0.07286632--0.07298852 & 0.09259499--0.16492574\\
\gl~d & 0.25222099--0.25281587 & 0.11886586--0.12266511\\
\noalign{\smallskip}\hline\noalign{\smallskip}
\multicolumn{3}{l}{With a $13.2~M_\oplus$ planet at 1~AU:}\\
\noalign{\smallskip}
\gl~b & 0.04060131--0.04061176 & 0.00475611--0.08969945\\
\gl~c & 0.07286289--0.07298820 & 0.09258994--0.16491917\\
\gl~d & 0.25222239--0.25280011 & 0.11882570--0.12246267\\
\hline
\end{tabular}
\end{table}