Lyα photons that enter through the Alice slit fall on the bare region of the detector, producing the observed narrow, symmetric Gaussian emission line near 1216.1 Å, as seen in Row 16 (purple). The larger aperture of the Alice box results in off-axis Lyα photons reaching the detector across a broader range of wavelengths, including those on the more sensitive KBr and CsI coatings on either side of the bare detector. The pipeline application of the effective area accounts for the differences in sensitivity across these three detector regions; however, artificial spikes in signal are produced at the transitions of those regions, as seen in the spectra of Row 23 (orange). We correct for the spikes by finding the average signal in the region and using that value across the region (black). As described in the text, total Lyα signal collected in rows within the Alice box are then normalized to the observed signal in Row 16.