Histograms of B (top row), γ (second row), α (third row) and αB, (bottom row) returned from the inversions under S1. The histograms are shown for pixels with maximum amplitude in at least one Stokes vector σ_t. The blue and red columns show the distributions for the scans on the 5 and 6 May, respectively. The percentages in all histograms are weighted with respect to the total number of pixels, i.e. including those with no polarization.