A Systematic Study of Mid-Infrared Emission from Core-Collapse Supernovae with SPIRITS

Understand

We present a systematic study of mid-infrared (mid-IR) emission from 141 nearby supernovae (SNe) observed with the InfraRed Array Camera (IRAC) on Spitzer.These SNe reside in one of the 190 galaxies within 20 Mpc drawn from the ongoing SPIRITS program.

• We detect 8 Type Ia SNe and 36 core-collapse SNe.
• All Type I SNe become undetectable within 3 years of explosion.
• About 22$\pm$11% of Type II SNe continue to be detected at late-times.