Likelihood contours and marginalized probability distributions for the clustering and shot-noise amplitudes of the CO power spectrum, conditioned on COMAP Season 2 data, in b- and v_eff-agnostic (upper) and -informed (lower) analyses. Black solid lines plotted with the 1D marginalized distributions indicate the 95% upper limits for each parameter. The solid and dashed 2D contours are meant to encompass 39% and 86% of the probability mass (delineated at Δχ² = {1, 4} relative to the minimum χ², corresponding to 1σ and 2σ for 2D Gaussians). We show the clustering and shot noise amplitudes for a subset of the models plotted in Fig. 1. Models shown in Fig. 1 but not shown here have values of A_clust or ⟨T b⟩² well beyond the 2σ regions shown.