P-values for the cross-correlations between the data’s tomographic pseudo E-modes and different systematics for a null detection (p ≤ 0.05 would indicate a detection). Here we show the systematics motivated in Sect. 4: object detection threshold (μ-threshold), extinction for the r-band, magnitude limit for the r-band, PSF ellipticities components in harmonic space (E/B-mode), the PSF size, and stellar overdensity from Gaia DR2 (Gaia Collaboration 2018). The highest correlation occurs for the PSF E-mode in the fifth tomographic bin, this is shown in Fig. 7 to be subdominant to the cosmological signal given the estimated statistical error in this particular tomographic bin.