Maps of the integrated emission in the CH₃OH 14₁−14₀ A⁻⁺ line (a) and 16₁−15₂ A⁻ line (b). The thick blue contours in the panel a show the map at the velocity of the peak brightness. c) The first-moment map of the maser emission with the intensity threshold of 0.9 Jy beam^-1 (which corresponds to approximately 600 K). The chain of circles shows the positions of the emission peaks in different spectral channels. The locations of the pre-burst and after-burst 6.7 GHz maser clusters are indicated. The thin contours in all panels show the 0.8 mm continuum emission. The contour levels are 0.1, 0.2, 0.4, 0.6, and 0.8 of the peak intensity. The synthesized ALMA beam is shown in the lower left corner.