  The correlated 3d sulphide BaVS_3 is a most interesting compound because of
the apparent coexistence of one-dimensional and three-dimensional properties.
Our experiments explain this puzzle and shed new light on its electronic
structure. High-resolution angle-resolved photoemission measurements in a 4eV
wide range below the Fermi level explored the coexistence of weakly correlated
a_1g wide-band and strongly correlated e_g narrow-band d-electrons that is
responsible for the complicated behavior of this material. The most relevant
result is the evidence for a_1g--e_g inter-band nesting condition.
