Signal and noise maps derived from the IRAM CO(1−0) datacube. Top left: Peak intensity of the brightness temperature (K) of the original cube. Top right: Noise level (σ) over the spectral range of the cube. The dotted black line represents the average level of noise (σ = 0.0081 K), used to create the following panel. As seen in the central channels, we cannot completely separate the cube’s signal from its noise, even after sigma-clipping. Bottom left: Noise model, or the spatial distribution of noise to be subtracted from the original map. Bottom right: Region with signal that surpasses 5σ. The dashed red circle in the upper-right corner shows the 22.49 arcsec beam size of the IRAM observation.