[CI] excitation vs. dust temperature for our sample. Our sources are represented as red-squares. Sources with 1σ to 3σ detections in either or both [CI] lines are represented as upper-limits. The dust temperatures for our sample are from the SED fits of Reuter et al. (2020). Also compared are the excitation temperatures of SMGs (blue stars), main-sequence galaxies at z ∼ 1 (purple hexagons), local galaxies (green points), and AGNs (grey diamonds) from the Valentino et al. (2020) compilation. The grey dashed line corresponds to the 1:1 relation between the dust and [CI] excitation temperatures.