These sources were observed in VCS4 observing campaign for two reasons: 1) to serve as troposphere calibrators; 2) to tie the VCS4 catalogue with the ICRF catalogue. Positions of these sources were determined using all observations, including VCS4. The estimates of source flux density and maps were derived using the latest VCS4 session at which a source participated. (NB: the number of observations is the total number of observations in all astrometry geodetic experiments).