Top: a 3 × 3 postage stamp plot where the top left panel is the observed density plot NGC 5897, and the other panels are example noise maps generated to assess the significance of the excess in NGC 5897, as described in Section 3.1. Note that regions masked in white correspond to pixels with values equal to 0 in the raw data, corresponding to a lack of coverage (see Figure 3). The red and yellow circles correspond to r_t and r_J, respectively, and the colorscale corresponds to what is shown in Figure 3. Bottom: An azimuthally averaged density profile of the background-subtracted observed data is shown as blue points, with the mean, 1σ, and 2σ of the distribution of density profiles from 1000 noise map samples shown in black/gray. The observed excess at the r_J is at a 4.6σ significance relative to distribution of density profiles from the noise maps.