Search for low-energy neutrinos from astrophysical sources with Borexino Astroparticle Physics Volume 125, February 2021, 102509 [DOI: doi.org/10.1016/j.astropartphys.2020.102509] (Submitted 1 October 2019, Accepted 29 August 2020, Available online 1 September 2020) Abstract We report on searches for neutrinos and antineutrinos