Photometry follow-up of 3 core-collapse SNe

SN 2020uik shows typical spectra for SNe II, while SN 2018fsh shows a boxy nebular H{alpha} profile, a signature of CSM interaction. We combine these 3 SNe with 7 events from the literature and analyze their hosts as a sample. We present multi-wavelength photometry of the hosts, and compare this to archival photometry of all BTS hosts.

Using the spectroscopically complete BTS, we conclude that 0.3%_-0.1_^+0.3^ of all CCSNe occur in elliptical galaxies. We derive star formation rates and stellar masses for the host galaxies and compare them to the properties of other SN hosts. We show that CCSNe in ellipticals have larger physical separations from their hosts compared to SNe Ia in elliptical galaxies, and discuss implications for star-forming activity in elliptical galaxies.