Seven Years of SN 2014C: a Multi-Wavelength Synthesis of an Extraordinary Supernova

Understand

SN 2014C was originally classified as a Type Ib supernova, but at phase {\phi} = 127 d post-explosion strong H{\alpha} emission was observed.

• SN 2014C has since been observed in radio, infrared, optical and X-ray bands.
• Here we present new optical spectroscopic and photometric data spanning {\phi} = 947 - 2494 d post-explosion.
• We address the evolution of the broadened H{\alpha} emission line, as well as broad [O III] emission and other lines.