Source	Epoch	Image	Visibility
1958-179	1995JUL24	2 GHz , 8 GHz	2 GHz , 8 GHz
	1995OCT02	2 GHz , 8 GHz	2 GHz , 8 GHz
	1996APR23	15 GHz	15 GHz
	1997JAN11	2 GHz , 8 GHz	2 GHz , 8 GHz
	1999JUN21	2 GHz+ , 8 GHz+	2 GHz+ , 8 GHz+
	2004JUL14	2 GHz , 8 GHz	2 GHz , 8 GHz
	2006JUL11	2 GHz+ , 8 GHz+	2 GHz+ , 8 GHz+
	2007JUN26	2 GHz+ , 8 GHz+	2 GHz+ , 8 GHz+
	2008MAY14	2 GHz+ , 8 GHz+	2 GHz+ , 8 GHz+

A "+" after the frequency indicates VLBA+ observations.