Comparison between the H I spectra of the low-velocity absorption system obtained with the JVLA and the WSRT. The WSRT spectrum has a velocity resolution of ∼34 km s⁻¹, and the JVLA spectrum, originally at a velocity resolution of 2.7 km s⁻¹, has been binned to roughly the WSRT channel resolution, followed by a Hanning smoothing. It thus has the same velocity resolution as the WSRT spectrum. Despite the difference in spatial resolution between the two observations (∼5 kpc for the WSRT and ∼350 pc for the JVLA), the strong similarity between the two profiles indicates that the H I producing the absorption and/or the background continuum is located on sub-kiloparsec scales from the centre (see text for details). Velocities are relative to systemic.