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tokens: to be robust as they are obtained without any assumptions. Table 3. Ro-vibrational partition function values computed at different temperatures. Notes. (a) Includes all states up to 400 cm −1 : the ground, v 11 = 1, v 18 = 1, and v 17 = 1 states. (b) Includes all states up to 1600 cm −1 . To compute the ro-vibrational partition function of the manifold containing all states up to 1600 cm −1 (referred to as “Manifold 2” in Table 3 ), we have applied a vibrational correction to our new ground state partition function values. The correction factor was calculated at each temperature summing up the contribution of all the vibrational states below 1600 cm −1 . Since we have no direct information about the vibrational energies of the states between 400 and 1600 cm −1 , they were either estimated under the harmonic approximation or taken from low-resolution measurements ( Bak et al. 1975 ). Higher energy levels were not considered in the calculation because they do not contribute significantly to Q even at 300 K. The vibration-rotation partition functions of the three manifolds of aminoacetonitrile, computed at temperatures between 2.725 and 300 K, are listed in Table 3 . Based on our results, we prepared new catalog entries for aminoacetonitrile in the ground and excited states. The line intensity of each transition was calculated using the partition function values from Col. 4 of Table 3 (“Manifold 2”), while the permanent dipole moment values μ a = 2.577(7) D and μ b = 0.575(1) D were taken from Pickett (1973) and assumed not to change upon the vibrational states. 4. Astronomical observations 4.1. Observations We used the ReMoCA imaging spectral line survey carried out toward the protostellar cluster Sgr B2(N) with ALMA. Details about the observational setup and data reduction of this survey were reported in Belloche et al. (2019) . In short, the observations covered the frequency range from 84.1 GHz to 114.4 GHz with five tunings, with a spectral resolution of 488 kHz (1.7–1.3 km s −1 ). The angular resolution (HPBW) varied between ∼0.3′′ and ∼0.8′′, with a median value of 0.6′′, which corresponds to ∼4900 au at the distance of Sgr B2. The rms sensitivity ranged from 0.35 mJy beam −1 to 1.1 mJy beam −1 , with a median value of 0.8 mJy beam −1 . The field was centered at ( α , δ ) J2000 = (), a position that is halfway between the two main hot molecular cores, Sgr B2(N1) and Sgr B2(N2), which are separated by 4.9′′ or ∼0.2 pc. Here we analyze the spectrum at the offset position Sgr B2(N1S) defined by Belloche et al. (2019) to reduce the optical depth of the continuum emission, which is partially optically thick toward the peak position of the main hot core Sgr B2(N1). Sgr B2(N1S) is located at ( α , δ ) J2000 = (, ), about 1′′ to the south of Sgr B2(N1). In Belloche et al. (2019) , the continuum and line emission of the ReMoCA survey was separated in the image plane because the hot cores detected in the field of view have different systemic