Identifications of six BL lacertae objects from the molonglo MC2 and MC3 catalogs

Optical linear polarization has been measured in 12 blue stellar objects (BSOs) from the MC2 and MC3 catalogs. Our results confirm six new BL Lacertae objects. Three other good candidates require further observation. Four of the six identifications have a steep-spectrum radio component, and it appears that working from a low-frquency radio survey, which includes a high proportion of steep-spectrum sources, eliminates a bias against the identification of such sources as BL Lacertae objects