... and occasionally, my personal horror of horrors, a magnetarThe inert remnants have enough mass to force protons and electrons together into neutrons (K-electron capture), producing a neutron star.
https://en.m.wikipedia.org/wiki/Magnetar
...The magnetic field of a magnetar would be lethal even at a distance of 1,000 km due to the strong magnetic field distorting the electron clouds of the subject's constituent atoms, rendering the chemistry of known lifeforms impossible.