Bootstrap results for the confirmed detections. Each panel represents the bootstrap results of each new detection in the respective order of: H I, Na I, Mg I, Ca II, Sc II, Ti II, Cr II, Fe I, Fe II, and Y II. The dark blue histogram represents the random Gaussian sample obtained with the 10 km s⁻¹ width, while the light transparent blue histogram is for the distribution width of 20 km s⁻¹. The solid blue vertical line indicates the measured line depth of the signal, with a standard deviation of the value present as a transparent blue-shaded region. The legend in the right panel plots labels the in-in, in-out and out-out residual distributions calculated during the bootstrapping process.