Searches for gravitational-wave bursts in the first part of the fourth LIGO-Virgo-KAGRA observing run
ORAL
Abstract
We present searches for gravitational-wave transients (bursts) using data from the first eight months of the LIGO–Virgo–KAGRA fourth observing run (O4a). These analyses target a broad range of bursts with durations from milliseconds to thousands of seconds. Excluding binary black hole merger events previously identified by low-latency searches, no additional gravitational-wave transients were found.
The searches probe astrophysical phenomena expected from a variety of sources, including core-collapse supernovae, neutron star f-mode oscillations, and non-axisymmetric deformations in magnetars. Compared to previous observing runs, the sensitivity to potential astrophysical sources has been significantly improved, both in terms of strain amplitude and the 90% confidence upper limits on source rate densities.
The searches probe astrophysical phenomena expected from a variety of sources, including core-collapse supernovae, neutron star f-mode oscillations, and non-axisymmetric deformations in magnetars. Compared to previous observing runs, the sensitivity to potential astrophysical sources has been significantly improved, both in terms of strain amplitude and the 90% confidence upper limits on source rate densities.
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Publication: https://arxiv.org/abs/2507.12282
https://arxiv.org/abs/2507.12374
Presenters
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Sergey G Klimenko
- University of Florida