Visualization of the two most extreme positions of the telescope drift during C05. Upper and lower panel both show superstamp images (Δt ≈ 47 d) indicating the peak-to-peak positional variation, that is, the minimal and maximal x coordinate of a star. The CCD pixel range is identical in both images. The red dots represent the mean position of a star throughout the observing run, and the filled red crosses connected to them mark the position at the time of the image. Red outlines crosses indicate the extreme opposite positions of a star. The white crosses indicate identical pixel coordinates in both panels to help to visualize the magnitude of the positional changes.