Near-UV spectra of exposures 3 and 4, and combined spectrum. The spectra are separated by constant offsets for display purposes. The two red vertical lines indicate the wavelength band 3065–3110 Å displaying the most significant flux within the spectra, which might stem from TiO emission. The green line indicates 2200 Å (see text). In light blue we display the uncertainty spectrum calculated with the variance method described in Appendix B.1.