UV and optical spectrum of QSO 0102−2209 from COS (purple) and MagE (maroon). Prominent emission features of the quasar are labeled, and regions of terrestrial contamination are shaded. For display purposes, both spectra have been smoothed and low signal-to-noise regions have been removed. As a reference, the wavelength scales as observed (top), in the rest-frame of the filament (upper bottom), and in the rest-frame of the quasar (lower bottom) are given.