Supporting data, regarding 'A comprehensive re-analysis of the O2 (B3Ʃ–u – X 3Ʃ–g) Schumann-Runge band system' by D M Creek and R W Nicholls A computer output divided into three sections: the first, a tabulation of spectroscopic constants used in connection with the printout of emission measurements [a complete tabulation exists in the affiliated published paper]; the second, the measurements band by band; and the third, a listing of all the measurements in order of wavenumber including band and line assignments. Front of printout reads 'G D M C S R 0 9 E'. Subject: Spectroscopy Produced by Creek at Building D3, A W R E [Atomic Weapons Research Establishment], Aldermaston, Berkshire, England. The affiliated paper was published in volume 341 of the Proceedings of the Royal Society A as 'A comprehensive re-analysis of the O2 (B3Ʃ–u – X 3Ʃ–g) Schumann-Runge band system'. 1 September 1973