Fig. 1.
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Images of the sample host galaxies. Top left: SDSS DR9 (https://www.sdss3.org/index.php) image of M61, along with the positions of SN 2008in and 2020jfo. Top right: SDSS DR9 image of NGC 772, along with the positions of 2003iq and 2003hl. Bottom left: PanSTARRS DR1 (https://archive.eso.org/dss/dss) image of NGC 922, along with the positions of 2002gw and 2008ho. Bottom right: DSS (https://outerspace.stsci.edu/display/PANSTARRS/) image of NGC 6946, along with the positions of 2004et and 2017eaw.
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