Two new diffuse bands in the VUV absorption spectrum of carbon monoxide at 105.6 and 103.0 nm have been identified. Their spectral characteristics are consistent with B (1)Sigma(+) (v = 4, 5) <-X(1)Sigma(+) (v = 0) (CO)-C-12-O-16 assignments, with band origins at 94700 +/- 120 cm(-1) and 97050 +/- 150 cm(-1) and predissociation linewidths of approximate to 350 and 450 cm(-1), respectively. These upper state vibrational levels occur in the 'avoided crossing region' of the 3s sigma, B Rydberg state and the repulsive part of the D'(1)Sigma(+) valence state potential energy surface. (c) 2005 Elsevier B.V. All rights reserved.