SourceEpochImageVisibility
1732+389
1997JAN11 2 GHz , 8 GHz 2 GHz , 8 GHz
1999JUN21 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2004FEB15 2 GHz , 8 GHz 2 GHz , 8 GHz
2007AUG01 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
A "+" after the frequency indicates VLBA+ observations.