Fig. A.2
Noise maps for Sgr B2(N) (top panels) and Sgr B2(M) (bottom panels) obtained from the determination of the continuum level, and after averaging the different noise maps produced for each spectral window. The central frequencies are indicated in each panel. The color bar is units of mJy beam-1, with a round synthesized beam of 0.̋4. See more details in Sect. 3.2 and Appendix A.
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