SourceEpochImageVisibility
0657+172
1995OCT12 2 GHz , 8 GHz 2 GHz , 8 GHz
1996APR23 15 GHz 15 GHz
1999JUN21 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
1999AUG02 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2007JAN24 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2009MAY13 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2009OCT07 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
A "+" after the frequency indicates VLBA+ observations.