🚨 Mysterious object in the gap – Shortly after the start of the fourth observing run, the @LIGO-Virgo-KAGRA collaborations detected a remarkable gravitational-wave signal. 😲
It's from the merger of a neutron star with an unknown compact object, most likely an unusually light-weight black hole falling into the “lower mass gap” between the heaviest neutron stars and the lightest black holes.
