VLBI flux

For each detected source at each band, two estimates of correlated flux density were computed: one integrated over the entire image (total CLEAN flux density) and another averaged only over the spatial frequencies > 60 Mega-lambda at S-band and > 200 Mega-lambda at X-band, which corresponds to the range [0.8, 1.0] of the maximum spatial frequencies of the array used (VLBA+). The latter estimate characterizes the flux density of unresolved components. Errors of our estimates of total correlated flux density are determined mainly by the accuracy of amplitude calibration, which is at the level of 5-10% at 1-10 GHz.