\begin{table}%t2
%\centering
\par
\caption{\label{tab_log}Log of spectroscopic observation.}
 \begin{tabular}{lllc}
 \hline\hline \noalign{\smallskip}
 Date       & Objects   & Position  & Seeing ($FWHM$)\\
 \hline
 2006 Sep. 19 & NGC~7619   &MN1,2,SKY1       &1.26\\
 2006 Sep. 20 &            &MJ1              &1.97\\
 2006 Sep. 27 &            &MN3,4,SKY2       &1.66\\
             &            &MJ2,3            &1.34\\
 2006 Sep. 28 &            &MJ4,5            &1.18\\
             &            &MN4,5            &1.42\\
 2006 Oct. 29 &            &MN6,7            &1.99\\
 2006 Nov. 17 &            &MJ6,7            &2.17\\
 2006 Nov. 22 &            &MN8,9            &1.47\\
 2007 Jan. 28 &\object{NGC~4125}     &MJ1,2,SKY1       &1.64\\
             &            &MN1,2            &1.36\\
 2007 Feb. 20 &            &MJ3,4,SKY2       &2.31\\
 2007 Feb. 21 &            &MN3,4,5,6 SKY3   &2.54\\
 2007 Feb. 22 &            &MJ5,6            &1.62\\
 2007 Mar. 14 &            &MJ7,8            &2.26\\
 2007 May 05 &            &MJ9,10,SKY4      &2.21\\
 2007 May 10 &            &MN7,8,SKY5       &1.63\\
 2007 May 11 &            &MJ11,12,SKY6     &1.70\\
 2007 Oct. 09 &\object{NGC~1600}     &MJ1,2,SKY1       &1.76\\
 2007 Oct. 16 &            &MN1,2,SKY2       &1.74\\
 2007 Oct. 20 &            &MJ3,4,SKY3       &1.42\\
 2007 Oct. 21 &            &MN3,4,SKY4       &2.15\\
 2007 Nov. 07 &            &MJ5,6,SKY5       &1.66\\
 2007 Nov. 19 &            &MN5,6,SKY6       &1.61\\
 2007 Dec. 15 &            &MN7,8,SKY7       &1.92\\
 2007 Dec. 16 &            &MN9,10,SKY8      &2.20\\
 2008 Jan. 10 &            &MJ7,8,SKY9       &2.29\\
 2008 Feb. 04 &            &MN11,12,SKY10    &2.57\\
 2008 Feb. 09 &            &MJ9,10,SKY11     &1.49\\
\hline
\end{tabular}
\tablefoot{MJ~=~major axis; 
 MN~=~minor axis; SKY= sky spectrum. 
 \tablefoottext{a}{The exposure time for each slit is 900~s;}
 \tablefoottext{b}{position angles of our galaxies.
\object{NGC~1600}: [MJ, MN] are [9, 99]; \object{NGC~4125}: [MJ, MN] are [82, 172];  \object{NGC~7619}: [MJ, MN] are [36, 126].}} 
\end{table}