Wavenumbers, strengths, widths and shifts with pressure of lines in four bands of gaseous ¹⁶O₂ in the systems a¹Δ_g-X³Σ_g ^- and b¹Σ_g ⁺-X³Σ _g ^-

In spectra of gaseous oxygen at 299 K with pressure/bar in the range [0.13,1.06] and lengths of absorbing path up to 107 m, we measured the wavenumbers, strengths, widths and shifts with pressure of 118 mostly fully resolved lines of ¹⁶O₂ due to rotational fine structure in the band a¹Δ_g(v=0)-X³Σ_g ^-(v=0), 59 lines in the band b¹Σ_g⁺(v=0)-X³Σ _g^-(v=0), 58 lines in the band b¹Σ_g⁺(v=1)-X³Σ _g^-(v=0) and 43 lines in the band b¹Σ_g⁺(v=2)-X³Σ _g^-(v=0); the latter band is measured quantitatively for the first time. Spectral parameters to reproduce wavenumber data are considerably improved over previously existing data. Band strengths, average widths and shifts of lines with pressure of pure O₂ are presented, and extensive comparison of these results is made with corresponding values from the literature.