CO SLEDs for J_u = 1,...,13 (J_u = 2 not included). In this image, the pixels correspond to the individual data points (30′′ in size) in our FTS maps at 42′′ resolution and the pair of numbers in the top right corner of each pixel shows a location of the pixel relative to the center of the FTS coverage ([0,0] is [RA, Dec] = [05^h39^m37^s, − 69°46′13′′]). The circles represent detected CO transitions and the downward arrows show upper limits based on 5σ_s. Most of the observed CO SLEDs show peak at J_u ≥ 6 (gray), while some pixels have peaks that are uncertain (red) or occur at the transitions lower than J_u = 6 (green). Finally, the best-fit RADEX models determined in Sect. 4.2 are overlaid in blue.