Fig. 3
Three-colour peak 13CO emission map of the science demonstration field. The velocity ranges used to produce the blue, green and red images are −130 to −110 km s-1, −110 to −60 km s-1 and −60 to +5 km s-1, respectively. The emission in these velocity ranges is dominated by the near-sides of the 3 kpc, Norma and Scutum-Centaurus arms, respectively.
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