Table 5: Fit of the magnitude uncertainty as a function of magnitude deduced from the common areas. This was used to compute uncertainties for individual galaxies: Uncertainty = slope $\times $ magnitude + constant term.
Magnitude band validity domain slope constant term
B [20,25.5] 0.0340 -0.5933
V [20,24.5] 0.0445 -0.8352
R [20,24] 0.0420 -0.7410
I [20,23.5] 0.0657 -1.1772

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