  The electronic structure of the iron chalcogenide superconductor FeSe_{1-x}
was investigated by high- resolution angle-resolved photoemission spectroscopy
(ARPES). The results were compared to DFT calculations showing some significant
differences between the experimental electronic structure of FeSe_{1-x}, DFT
calculations and existing data on FeSe_{x}Te_{1-x}. The bands undergo a
pronounced orbital dependent renormalization, different from what was observed
for FeSe_{x}Te_{1-x} and any other pnictides.
