Radial profile of HD 1973 on a deep (3 ROS) ERO stack in the I_E -band (top) and the Y_E -band (bottom). These two profiles reveal distinct characteristics of the VIS and NISP instruments. For VIS, the extended halo concludes at a radius of 290ʺ, with AutoProf not detecting any signal beyond this point. In contrast, the NISP extended halo exhibits a notable excess of light at a radius of 260ʺ, indicative of its refractive optics (this feature is observable as a distinct arc in Fig. 23), and terminates shortly thereafter at a radius of 320ʺ. Cyan and red points refer to the colours of isophotes in an associated AutoProf visual, which help guide the eye when comparing plots.