Source	Epoch	Image	Visibility
1548+056	1997JAN11	2 GHz , 8 GHz	2 GHz , 8 GHz
	2001JAN29	2 GHz+ , 8 GHz+	2 GHz+ , 8 GHz+
	2005AUG26	8 GHz	8 GHz

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