\begin{table}%t2
%\centering
\par
\caption{\label{dates}Journal observations for the 30 detected galaxies in the sample.}
\par
\begin{tabular}{llll} 
\hline\hline \noalign{\smallskip}
\textbf{Galaxy} & Observation dates & \textbf{Galaxy} & Observation dates\\
\hline
$3C31$	& 1999 Dec.	& $NGC~315$	& 2002 Jun.\\
	& 2000 Jan.	& 		& 2006 Oct.		\\
$3C66BB$& 2000 Jan.	& 		& 2007 Apr.	\\
	& 2003 May	& $NGC~326$	& 2006 Oct.	\\
$3C83.1$& 2000 Jan.	& $NGC~541$	& 2002 Jun.	\\
$3C88$	& 1999 Dec.	& $NGC~708$	& 2006 Oct.\\
	& 2000 Jan.	& $NGC~3801$	& 2002 Jun\\
$3C129$	& 2000 Jan.	& $NGC~4278$	& 2007 Jan.	\\
$3C264$	& 2000 Jan.	& 		& 2007 Apr.\\
$3C272.1$&2000 Jan.	& $NGC~5127$	& 2002 Jun.\\
$3C274$	& 2000 Jan. 	& $NGC~7052$	& 2002 Jun.\\
$3C305$	& 2004 Feb.	& 		& 2006 Jul.	\\
	& 2004 Mar.	& $B2~0116+31$	& 2003 Dec.\\
$3C321$	& 2004 Mar.	& 		& 2006 Jun.	\\
$3C327$	& 2004 Mar.	& 		& 2006 Oct.	\\
$3C353$	& 2000 Jan.	& $B2~0648+27$	& 2004 Feb.\\
$3C386$	& 1999 Dec.	& 		& 2004 Mar.	\\
$3C403$	& 2003 Dec.	& 		& 2006 Oct.\\
	& 2004 Feb.	& $B2~0836+29B$	& 2004 Mar.\\
$3C442$	& 2000 Jan.	& $B2~0924+30$	& 2007 Apr.	\\
$3C449$	& 1999 Dec.	& $B2~1347+28$	& 2007 Jan.\\
	& 2000 Jan.	& 		& 2007 Apr.\\
	&		& $OQ208$	& 2004 Mar.\\
\hline
\end{tabular}
\end{table}