Critical comments on publications by S. Hoffmann and N. Vogt on historical novae/supernovae and their candidates

We critically discuss recent articles by S. Hoffmann and N. Vogt on historical novae and supernovae (SNe) as well as their list of “24 most promising events” “with rather high probability to be a nova” (Hoffmann et al., AN , 2020, 341, 79 (P3)). Their alleged positional accuracy of previously suggested historical nova/SN records is based on inhomogeneous datasets (Vogt et al.), but then used for the nova search in Hoffmann et al., AN , 2020, 341, 79 (P3). Their claim that previously only “point coordinates” for nova/SN candidates were published, is fabricated. Their estimate of expected nova detection rates is off by a factor of 10 due to mis-calculation. They accept counterparts down to 4–7 mag at peak, which is against the consensus for the typical limit of naked-eye discovery. When they discuss previously suggested identifications of historical novae, which they all doubt, they do not present new facts (Hoffmann, MNRAS , 2019, 490, 4194 (P2)). Their catalog of “24 most promising events” for novae (Hoffmann et al., AN , 2020, 341, 79 (P3)) neglects important recent literature (e.g. Pankenier et al., Archeoastronomy

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