Comparison of the v_LSR of the brightest ¹³CO emission feature from the GRS data toward a BGPS object compared to the (left) HCO(3–2) velocities of Shirley et al. (2013) and (right) NH₃(1,1) velocities of Dunham et al. (2011b). The vertical gray dashed line in each panel represents the lower v_LSR bound of GRS observations. Objects depicted in pink (v_LSR <5 km s⁻¹) would, therefore, not be detectable in the GRS data. The light blue region marks the |Δv_LSR | ⩽ 5 km s⁻¹ used to compute the matching statistic shown at the top of each panel.