Color-scale presents the 1st moment maps (intensity-weighted velocities) of the NH₃ inversion transitions from (1, 1) to (7, 7) as indicated in each panel. The first two left panels show the data for the NH₃(1, 1) line with different weighting schemes (natural weighting and robust weighting, which is a hybrid between natural and uniform weighting). The other NH₃ lines are always presented with robust weighting 0. The 1st moment maps are clipped at a ~4σ level. The contours show in all panels the 1.2 cm continuum emission in levels of 8% to 98% of the peak emission (7.4 mJy beam^-1). The two stars indicate the CH₃OH maser positions by Moscadelli & Goddi (2014). The line in the bottom right panel indicates the position-velocity cut shown below.