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The Baikal-GVD telescope studied 92 objects in search of neutrinos but found no convincing signals.
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Neutrinos are particles-ghosts, predicted by Wolfgang Pauli and named by Enrico Fermi. They are born in exploding stars and near black holes in our Galaxy, passing through any matter unhindered. In the Baikal water, they are caught by the Baikal-GVD telescope: when a ghost nudges an atom, a muon is born and a flicker of light appears — sensitive detectors notice even a single photon.
Over five years, astrophysicists checked 92 suspicious patches of sky. They searched for muons flying upward — only a neutrino that pierced the Earth could have produced them. No bright signals were found, but they calculated how many neutrinos definitely do not come from each object. Only the star cluster Westerlund 1 gave a faint hint. This negative result sharpens future searches: knowing where the ghosts aren't makes it easier to find those that are hiding.