Integrated intensity maps of H₂O at 988 GHz (first row) and 557 GHz (second row). The velocity ranges are indicated at the top of each column. The first contour levels of H₂O (557 GHz) are at −3σ (blue contour) for the absorption, 3σ (white contour) for the emission in steps of 1.5 K km s⁻¹ (−1.5 K km s⁻¹ for the absorption, σ in the range 1.0–1.5 K km s⁻¹ for all velocity ranges). The first contour levels of H₂O (988 GHz) are at 3σ (white contour) for the emission in steps of 7 K km s⁻¹ (σ in the range 2.0–3.5 K km s⁻¹ for all velocity ranges). The wedge above each panel shows the H₂O integrated intensity scale given in K km s⁻¹. The black star represents Sgr A^* and the origin of the offsets in arcsec. Black crosses and their numbers show positions associated with GC sources labeled in the H₂O maps at 557 GHz. Spectra from those positions are shown in Fig. 3. Beam sizes (38′′ at 557 GHz and 22′′ at 988 GHz) are shown in the left corner of the first column.