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Fig. B.1


Absorption spectra obtained with ALMA. The spectra are plotted as baseline subtracted line/continuum data. They have been vertically shifted and clipped for clarity. Toward G0.02-0.07 data are displayed toward four positions that correspond to the brightest continuum peaks: #1 at 17:45:51.9, −28:59:27.3; #2 at 17:45:52.1, −28:59:40.8; #3 at 17:45:52.4, −29:00:03.5; #4 at 17:45:51.6, −29:00:22.8.

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