Fig. 2
From: Auroral molecular-emission effects on the atomic oxygen line at 777.4 nm
Eight spectra that were measured with the spectrograph at wavelengths of 750–800 nm from 00:11:34 to 00:12:44 UT on March 2, 2017 (blue). A vertical dashed line is marked at 777.4 nm. The orange and yellow curves are explained in the text. The transmittance of the optical filter that is mounted on the EMCCD camera in Tromsø is represented in by a gray curve