Figure 2. HST Wide Field Camera sub-pixelised images showing the
quasar and the damped Lyman alpha galaxy S1. Each box is 3.5 arcsec on a
side,
and the size of each sub-pixel is 0.05 arcsec. Top row combined images
for, from left to right, the B, M, and I filters. Bottom row, the same
images after subtraction of the quasar psf, to disclose the image of S1.