The four members of LH-SBC3 spectroscopically confirmed by NOEMA. Left: NOEMA spectra of four confirmed cluster members. The channel width of the spectra is rebinned to be ∼150 km s⁻¹. The detected lines are highlighted in yellow. CO(4–3) and [CI](1–0) frequencies are marked by vertical bars in red and blue, respectively. Right: 3 mm continuum images of the four members overlaid by CO(4–3) intensity contours in yellow. The red circles denote the positions of the galaxies determined by the flux peak of the 3 mm continuum. The CO(4–3) intensity contours start at 1σ (equivalent to ∼56 mJy km⁻¹ beam⁻¹) in steps of 1σ. Beams of the 3 mm and CO(4–3) intensity maps are shown in the second panel as black-hatched and yellow patterns corresponding to 3.43″ × 3.60″and 2.37″ × 2.02″, respectively.