Fig. 2
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Averaged 1.3 cm NH3 lines of 12 P observed on December 14, 2023. From top to bottom, they are NH3(1, 1) to (5, 5). The frequency resolution of NH3(3, 3) was 0.057 MHz (and about 0.0114 MHz for the other four lines), corresponding to a velocity resolution of 0.0719 km s−1 (about 0.14 km s−1 for the other four lines) after smoothing.
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