Parameterized model to approximate theoretical collision-induced absorption band shapes for O2-O2 and O2-N2

•We present a parameterized representation of recent quantum calculations for collision-induced absorption by O2-O2 and O2-N2 about the 1.27 μm monomer band of O2.•We demonstrate that this empirical representation can accurately simulate the theoretical calculations, and we present a global fit of the model to previously reported collision-induced absorption spectra (O2-O2, O2-N2, and O2-air) measured by cavity ring-down spectroscopy over the temperature range 271 K–332 K.•The ability to impose theoretical constraints on the magnitude and shape of the CIA is expected to help decouple the concurrently observed monomeric and bimolecular features, which should ultimately lead to more accurate measurements of the CIA and improved spectroscopic models.