The reaction C-2(X(1)Sigma, a(3)II) + O-2(X(3)Sigma) -CO(X(1)Sigma, A(1)II, a' (3)Sigma, d(3)Delta e(3)Sigma) + CO(X(1)Sigma) has been studied in two types of reactors. A Pyrex steady-state fast-flow reactor at approximately 500 K was used to obtain the spectral distributions of the CO (A(1)II-X(1)Sigma) emissions in the vacuum ultraviolet (VUV) and the CO triplet states emissions in the visible and near-LR (vis) wavelength region. The VUV emission had not previously been positively identified. The C2 was produced from the C2Cl4 + K reaction. In a pseudostatic high-temperature photochemistry (HTP) reactor C-2 was made by 193 nm multiphoton dissociation of C2Cl4. That apparatus was used for quenching and rate coefficient experiments in the time domain, The VUV quenching measurements confirm the orbital symmetry argument that the reaction proceeds through excited C2O2 intermediates. Reaction schemes for C-2(X(1)Sigma) and for C-2(a(3)II) are presented. The results are compared to those from the O + C2H2 reaction, which leads via C2O + O to the same band systems emissions, and the differences are discussed. Measurements of the overall rate coefficients from the decrease of the vis chemiluminescence intensities with time yielded k(vis)(298-711 K) = 1.1 x 10(-11) exp(-381 K/T) cm(3) molecule(-1) s(-1), with 2 sigma precision limits of around +/-5% and corresponding estimated accuracy limits of about +/- 21%. This expression is in excellent agreement with earlier rate coefficient values determined by different methods. The VUV experiments yielded slightly higher values, the reason for which is uncertain. It is speculated that an apparent continuum observed in the VUV spectra could be (C2O2)-C-1 excimer radiation to the repulsive ground state.