observed in AD 776, not AD 774/5 (e.g. Gibbons & Werner 2012).

The nova or SN candidate listed as [*Hye Sung*]{} (an ancient Korean comet name) in Chu (1968) for AD 776 Jun 1-30 in Tau-Aur (from the Korean Lee Dynasty chronology during the reign of He Gong Sinla) is more likely a comet or nova (observed for only 30 days), possibly without a tail.

Hambaryan & Neuhäuser (2013, HN13) considered absorbed SNe quantitatively: For the typical SN energy of $\sim 10^{51}$ erg, of which $\sim 1\%$ would be radiated in $\gamma$-rays, the hypothetical SN would have taken place at some $\sim 124$ pc only - for the Miyake et al. (2012) energy estimate; for the lower energy estimate from Usoskin et al. (2013), the distance can be $\sqrt{4-6}$ times larger. If the SN was either more energetic and/or more energy would have been radiated in $\gamma$-rays, then the SN could have been further away. In the latter case, its SN remnant and possible compact remnant might have remained undetected so far.

Cliver et al. (2013) and Neuhäuser & Hambaryan (2014) both discussed the different doubts that are connected with the solar super-flare hypothesis (Usoskin et al. 2013). The suggestion 