Radioactive 26Al and massive stars in the Galaxy by Roland Diehl and others
= Radioactive 26Al and massive stars in the Galaxy by Roland Diehl and others
{title2=2006}
https://arxiv.org/abs/astro-ph/0601015
The paper's radioactive-aluminium measurements and population model give a Galactic <core-collapse supernova> rate of $1.9\pm1.1$ per century in its abstract. This is a historical estimate, not an exact constant.