Contributions to selected elements of the analytic band power covariance. Shown are the relative contributions of the absolute values of the six covariance terms: sample variance (red), mixed term (orange), and shot/shape noise (yellow) in the Gaussian covariance; non-Gaussian in-survey covariance (purple) and super-sample covariance (green); and the multiplicative shear bias uncertainty (grey). Each panel corresponds to a single row in the covariance matrix of the full GGL and cosmic variance data vector, for the signal and angular frequency band indicated in the label; columns in each panel have the same ordering of signals but show all 8 bands, respectively. A representative subset of signals was chosen: two GGL signals, as well as a low- and high-redshift cosmic shear signal, and the corresponding redshift bin cross-correlation.