Flux density for LBCS sources coincident with an unresolved FIRST source and a WENSS source vs FIRST/WENSS spectral index. The light green crosses (in background) indicate the general population of WENSS/FIRST coincidences, dark green crosses represent those sources observed with LBCS and detected, and red crosses represent the sources observed with LBCS but not detected. The right panel contains only sources that are also VLBA calibrators.