SourceEpochImageVisibility
0859+470
1995APR12 2 GHz , 8 GHz 2 GHz , 8 GHz
2000JUL06 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2008SEP03 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2009OCT07 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
A "+" after the frequency indicates VLBA+ observations.