Null test for pipeline-induced correlations. As in Fig. 8, the correlation between the Lyα-forest pixels and the CIV-forest pixels, is shown, but now for four angular ranges as labeled and offset by 0.1 successively for clarity. Pixel pairs with are excluded. There is no evidence for pipeline-induced systematics with the χ² for vanishing correlation for is (32.5, 31.2, 22.7, 40.0) for the four ranges, each with 38 data points.