Blow-up of the Hα region in the mid-resolution OSIRIS spectrum of AT 2020hat at phase +33 d, compared with two low-resolution spectra taken at earlier (+6 d) and later (+75.9 d) phases. As no H II regions in the proximity of AT 2020hat have been spectroscopically observed in order to more accurately estimate the redshift at the LRN location, the spectra have been corrected for the average redshift of NGC 5068 (z = 0.002235).