Top panel: histogram of numbers of galaxies in the systemic velocity window 19,000−26,000 km s⁻¹ as a function of radius from a center at SGX _c = –400 km s⁻¹, SGZ _c = 5000 km s⁻¹ in 100 km s⁻¹ bins. Numbers are normalized by the area within each 100 km s⁻¹ bin. Bottom panel: histogram of velocities in 100 km s⁻¹ bins of groups that are projected into a ring of width with bounds 10,600−12,000 km s⁻¹ centered at SGX _c = –400 km s⁻¹, SGZ _c = 5000 km s⁻¹.