SourceEpochImageVisibility
2209+236
1997JAN10 2 GHz , 8 GHz 2 GHz , 8 GHz
1998APR15 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
1999JUN21 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2006JUL11 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2006SEP13 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
2007JAN24 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+
2009MAY13 2 GHz+ , 8 GHz+ 2 GHz+ , 8 GHz+
A "+" after the frequency indicates VLBA+ observations.