ACA Detection of [C I]_1 → 0 at z = 2.39 toward the lensed galaxy SGASJ0033-A. Upper panel: continuum subtracted spectrum at 145 GHz extracted from the A.1+A.2 aperture (dashed gray line in lower panel) with 2 channel binning (gray line). The overlaid purple curve is the result of the convolution between the observed spectrum and a Gaussian kernel with FWHM equal to the best fit value of the ¹²CO(4 → 3) line. The velocity axis is centered at the redshift of ¹²CO(4 → 3). Lower panel: integrated [C I] emission contours (black solid/dahsed curves) at the ±2, 3σ levels on top of the ¹²CO(4 → 3) moment map. The crossed ellipse at the lower left corner indicates the size and orientation of the [C I] beam.