All-sky search for short gravitational-wave bursts in the first part of the fourth LIGO-Virgo-KAGRA observing run

al-Shammari, Sama, Bergamin, F., Divyajyoti, Divyajyoti ORCID: https://orcid.org/0000-0002-2787-1012, Dooley, K. ORCID: https://orcid.org/0000-0002-1636-0233, Fairhurst, S. ORCID: https://orcid.org/0000-0001-8480-1961, Grote, H. ORCID: https://orcid.org/0000-0002-0797-3943, Hannam, M. ORCID: https://orcid.org/0000-0001-5571-325X, Higginbotham, S., Javed, W. ORCID: https://orcid.org/0009-0009-1471-7890, Kinnear, M., Kokeyama, K. ORCID: https://orcid.org/0000-0002-2896-1992, Kuntimaddi, N., Macleod, D. ORCID: https://orcid.org/0000-0002-1395-8694, North, C., Patra, A., Patterson, B., Pearce, T., Raymond, V. ORCID: https://orcid.org/0000-0003-0066-0095, Riley, H., Skliris, V., Sutton, P. ORCID: https://orcid.org/0000-0003-1614-3922 and Tanioka, S. 2025. All-sky search for short gravitational-wave bursts in the first part of the fourth LIGO-Virgo-KAGRA observing run. Physical Review D 112 , 102005. 10.1103/wjdz-jdby

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Abstract

We present a search for short-duration gravitational-wave transients in data from the first eight months of Advanced LIGO-Virgo-KAGRA’s fourth observing run, denoted O4a. We use four analyses which are sensitive to a wide range of potential signals lasting up to a few seconds in the 16–4096 Hz band. Excluding binary black hole merger candidates that were already identified by low-latency analyses, we find no statistically significant evidence for other gravitational-wave transients. We measure the sensitivity of the search for representative signals, including sine-Gaussians, Gaussian pulses, and white-noise bursts with different frequencies and durations, adopting a false alarm rate of 1 per 100 years as detection threshold. Depending on signal type, we find improvements over previous searches by factors of 2 to 10 in terms of sensitivity to strain amplitude and of 90% confidence upper limit on the rate density of sources. We also evaluate a variety of core-collapse supernova models and find that, for some models, the search could have detected gravitational waves from stellar core-collapse throughout the Milky Way.

Item Type:	Article
Date Type:	Publication
Status:	In Press
Schools:	Schools > Physics and Astronomy
Additional Information:	For the full list of authors, please refer to the article webpage: https://doi.org/10.1103/wjdz-jdby
Publisher:	American Physical Society
ISSN:	1550-7998
Date of First Compliant Deposit:	5 December 2025
Date of Acceptance:	17 November 2025
Last Modified:	05 Dec 2025 11:45
URI:	https://orca.cardiff.ac.uk/id/eprint/182940

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