FIG. 3.

AD Leo flux in quiescent state (black line) and during the flare as observed from Earth. Vertical dotted lines show the wavelength extent of the various spectrograph gratings: the IUE short wavelength camera (SWP) grating, from 1150 to 2000 Å, the IUE long wavelength camera (LWP) grating from 1850 to 3100 Å, and the blue edge of the optical spectrum at 3560 Å, obtained with the McDonald Observatory Electronic Spectrograph No. 2. IUE spectra were taken in low-resolution mode, providing a resolution of 6 Å, while the optical spectra have a resolution of 3.5 Å. As the bulk flux distribution, rather than the detailed line profiles, were the primary concern in this work, the spectra were rebinned prior to being input to the photochemical/climate model. Color images available online at www.liebertonline.com/ast.