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Fig. A.1.
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NH3 (9,6) and (10,7) maser lines from the 100-m telescope at Effelsberg toward a region south of Sgr B2(M), at αJ2000 = 17h47m20
8, δJ2000 = −28°23′32
1. The three red dashed lines indicate the three different velocity components at VLSR = ∼72 km s−1, ∼77 km s−1, and ∼84 km s−1.
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