FIG. 5: 90% confidence level upper limit on σSI from this work (thick black line) with the 1σ (green) and 2σ (yellow) sensitivity bands. Previous results from LUX [6] and PandaX-II [7] are shown for comparison. The inset shows these limits and corresponding ±1σ bands normalized to the median of this work’s sensitivity band. The normalized median of the PandaX-II sensitivity band is shown as a dotted line.