Top left panel: 2″ × 2″ HST/WFC3 image stamps. It shows SN 2018aoq at an epoch of 24 d after explosion while all others show pre-explosion images (Table A.3). The filter and epoch are labelled. The offset between the star and SN position, and the associated positional error (in mas) is also indicated. The centroid of the SN position, as measured from the image in the top left panel, is shown with a red circle, the radius of which is twice the uncertainty in the position for clarity. The limiting and absolute magnitudes for the progenitor in each filter are m_F555W > 28.0 (−3.3), m_F350LP >  26.8 (−4.5), m_F814W >  26.0 (−5.3), and m_F160W >  24.1 (−7.2).