SourceEpochImageVisibility
0738+491
1998JUN24 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2004JUL14 2 GHz , 8 GHz 2 GHz , 8 GHz
2007AUG01 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2008JAN23 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2009JAN21 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2010JUN23 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
A "+" after the frequency indicates VLBA+ observations.