The search for failed supernovae with the Large Binocular Telescope: a new candidate and the failed SN fraction with 11 yr of data

Understand

We present updated results of the Large Binocular Telescope Search for Failed Supernovae.

• This search monitors luminous stars in 27 nearby galaxies with a current baseline of 11~yr of data.
• We re-discover the failed supernova (SN) candidate N6946-BH1 as well as a new candidate, M101-OC1.
• M101-OC1 is a blue supergiant that rapidly disappears in optical wavelengths with no evidence for significant obscuration by warm dust.