Comparison between the bsens and cleanest data sets. The X-axis shows the fraction of the bandwidth used in the cleanest continuum. The Y-axis shows the ratio of the noise in bsens vs. that of cleanest. The data are the MAD-measured standard deviation in the noise measurement regions. The black curve shows the theoretical expectation that the noise goes down as the square root of the bandwidth, σ ∝ Δν^−1/2. Points above the curve have excess noise in the bsens data, while points below improved more than expected.