SN 2021afdx

SN 2021afdx is a Type IIb supernova that exploded in the Cartwheel Galaxy, a ring galaxy located approximately 500 million light-years away in the constellation Sculptor. Discovered on 23 November 2021 by the Asteroid Terrestrial-impact [Last Alert System], it is one of the few supernovae observed in detail with both ground-based telescopes and the James [Webb Space Telescope]. The event is notable for revealing an infrared echo from pre-existing circumstellar dust, providing key insights into dust production and heating mechanisms in core-collapse supernovae.

Observation

SN 2021afdx was later observed by JWST during its Early Release Observations of the Cartwheel Galaxy in approximately 200 days post-explosion.
Follow-up spectroscopy conducted by the extended Public ESO Spectroscopic Survey for [Transient Objects] using the FLOYDS spectrograph at the Las Cumbres Observatory confirmed its classification as a Type IIb supernova.