SourceEpochImageVisibility
2320+506
1995OCT12 2 GHz , 8 GHz 2 GHz , 8 GHz
2000JUL06 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2006SEP13 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
A "+" after the frequency indicates VLBA+ observations.