Gravitational Wave GroupThe Gravitational Wave Group at KU Leuven — part of the Laboratory for Semiconductor Physics and the Leuven Gravity Institute. Data analysis for LIGO, Virgo, and the Einstein Telescope, detector noise and calibration, and gravitational waves from core-collapse supernovae.https://leuven-gravity-institute.github.io/feed.xml2026-08-27T00:00:00ZGravitational Wave Grouphttps://leuven-gravity-institute.github.ioSpingarn’s method and progressive decoupling beyond elicitable monotonicityhttps://leuven-gravity-institute.github.io/publications/#303597998afc2026-08-27T00:00:00ZBrecht Evens, Puya Latafat, Panagiotis Patrinos — Computational Optimization and Applications (2026)Updated Upper Limits on the Isotropic Gravitational-Wave Background from LIGO, Virgo, and KAGRA Data through April 2025https://leuven-gravity-institute.github.io/publications/#d664f96535102026-08-24T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2608.23477Modified Bryson-Frazier Smoothing and Hyperparameter Learning for Temporal Gaussian Process Regressionhttps://leuven-gravity-institute.github.io/publications/#1e7efd4fa3fb2026-08-18T00:00:00ZTom Colemont, Brecht Evens, Tjonnie G. F. Li, Frederik De Ceuster — arXiv (Cornell University) (2026)Upper limits on the isotropic gravitational-wave background from the first part of LIGO, Virgo, and KAGRA’s fourth observing runhttps://leuven-gravity-institute.github.io/publications/#d6edc3ca03782026-08-15T00:00:00ZA. G. Abac et al. (incl. T. G. F. Li, M. Wils, I. C. F. Wong) — Physical Review D 114, 042001 (2026)GW240925 and GW250207: Astrophysical Calibration of Gravitational Wave Detectorshttps://leuven-gravity-institute.github.io/publications/#96579f5306ae2026-08-13T00:00:00ZA. G. Abac et al. (incl. T. G. F. Li, M. Wils, I. C. F. Wong) — Physical Review Letters 137, 071401 (2026)Constraints on ultralight bosons from merging binary and remnant black holes observed during the second and third parts of the fourth LIGO-Virgo-KAGRA observing runhttps://leuven-gravity-institute.github.io/publications/#aa3b0268aa3f2026-08-12T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2608.11620Advanced Virgo during the LIGO-Virgo-KAGRA fourth observing runhttps://leuven-gravity-institute.github.io/publications/#65d89a3e743d2026-07-29T00:00:00ZF. Acernese et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2607.26872GWTC-5.0: Tests of General Relativityhttps://leuven-gravity-institute.github.io/publications/#8ff6be5321b42026-07-21T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2607.19293Calibration of the AdvancedVirgo+ Gravitational Wave Detector and Reconstruction of the Detector Strain h(t) during the Observing Run O4https://leuven-gravity-institute.github.io/publications/#871e7cb377752026-07-21T00:00:00ZF. Acernese et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2607.19273The impact of physically motivated calibration errors on search pipeline detection parameters for broadband burst Signalshttps://leuven-gravity-institute.github.io/publications/#53ce4191deb72026-07-19T00:00:00ZMilan Wils, Brad Ratto, Jeffrey S. Kissel, Tjonnie G.F. Li, Marek J. Szczepańczyk, Gabriele Vedovato, Michele Zanolin — arXiv:2607.17439Sub-Torque-Balance Upper Limits on Continuous Gravitational Waves from Scorpius X-1https://leuven-gravity-institute.github.io/publications/#70bd32d7cfd32026-07-08T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2607.07765Narrowband Searches for Continuous Gravitational Waves from known Pulsars in the First Two Parts of the Fourth LIGO–Virgo–KAGRA Observing Runhttps://leuven-gravity-institute.github.io/publications/#724a1e3b25152026-07-07T00:00:00ZA. G. Abac et al. (incl. T. G. F. Li, M. Wils, I. C. F. Wong) — The Astrophysical Journal 1005, 221 (2026)GWTC-4.0: Population Properties of Merging Compact Binarieshttps://leuven-gravity-institute.github.io/publications/#1aa6d15548e22026-07-03T00:00:00ZA. G. Abac et al. (incl. T. G. F. Li, A. Offermans, M. Wils, I. C. F. Wong) — The Astrophysical Journal Letters 1005, L51 (2026)Constraints on Gravitational Waves from the 2024 Vela Pulsar Glitchhttps://leuven-gravity-institute.github.io/publications/#96643ce390862026-06-19T00:00:00ZA. G. Abac et al. (incl. T. G. F. Li, M. Wils, I. C. F. Wong) — The Astrophysical Journal 1005, 12 (2026)GW230814: Investigation of a Loud Gravitational-wave Signal Observed with a Single Detectorhttps://leuven-gravity-institute.github.io/publications/#a927e7f4bc792026-06-18T00:00:00ZA. G. Abac et al. (incl. T. G. F. Li, M. Wils, I. C. F. Wong) — The Astrophysical Journal Letters 1004, L23 (2026)Impact of the Einstein Telescope's duty cycle on the estimation of binary black holes parametershttps://leuven-gravity-institute.github.io/publications/#b691a11f86602026-06-17T00:00:00ZLuca Negr, Thomas C.K. Ng, Thibeau Wouters, Tim J. Kuhlbusch, Harsh Narol, Robin Chan, Kailib Ryan Doney, Francesco Cireddu, Isaac C.F. Wong, Fabian Gittins, Peter T.H. Pang, Anuradha Samajdar, Achim Stahl, Justin Janquart, Chris Van Den Broeck, Tjonnie G.F. Li — arXiv:2606.19201Open Data from LIGO, Virgo, and KAGRA through the Second Part of the Fourth Observing Runhttps://leuven-gravity-institute.github.io/publications/#81598b6d472f2026-05-26T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2605.27090GWTC-5.0: Population Properties of Merging Compact Binarieshttps://leuven-gravity-institute.github.io/publications/#a7f4be7f21462026-05-26T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2605.27226GWTC-5.0: Observations from the Second Part of the Fourth LIGO-Virgo-KAGRA Observing Run and Updates to the Gravitational-Wave Transient Cataloghttps://leuven-gravity-institute.github.io/publications/#c49149267fc32026-05-26T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2605.27225GWTC-5.0: Methods for Identifying and Characterizing Gravitational-wave Transientshttps://leuven-gravity-institute.github.io/publications/#3b01de16a0172026-05-26T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2605.27224GWTC-5.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagationhttps://leuven-gravity-institute.github.io/publications/#a7a762d039f82026-05-26T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2605.27227GWTC-5.0: An Introduction to Version 5.0 of the Gravitational-Wave Transient Cataloghttps://leuven-gravity-institute.github.io/publications/#64d8077fd42c2026-05-26T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2605.27223Deep Search for Joint Sources of Gravitational Waves and High-energy Neutrinos with IceCube during the Third Observing Run of LIGO and Virgohttps://leuven-gravity-institute.github.io/publications/#136376f69d902026-05-13T00:00:00ZR. Abbasi et al. (incl. T. G. F. Li, A. Offermans, M. Wils, I. C. F. Wong) — The Astrophysical Journal 1003, 41 (2026)Searches for Binary Mergers with Sub-solar Mass Components in Data from the First Part of LIGO--Virgo--KAGRA's Fourth Observing Runhttps://leuven-gravity-institute.github.io/publications/#c20d2ec382c42026-05-06T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2605.05444Quadratic gravity corrections to scalar QNMs of rapidly rotating black holeshttps://leuven-gravity-institute.github.io/publications/#512a0a177a552026-04-02T00:00:00ZStef J.B. Husken, Tom van der Steen, Simon Maenaut, Kelvin Ka-Ho Lam, Maxim D. Jockwer, Adrian Ka-Wai Chung, Thomas Hertog, Tjonnie G.F. Li, Nicolás Yunes — arXiv:2604.02214The Science of the Einstein Telescopehttps://leuven-gravity-institute.github.io/publications/#c04d5b4c641b2026-03-26T00:00:00ZAdrian Abac et al. (incl. Francesco Cireddu, T.G.F. Li, Milan Wils, Isaac C.F. Wong) — Journal of Cosmology and Astroparticle Physics 2026, 081 (2026)Advanced Virgo Plus for O5 -- Design Report Overviewhttps://leuven-gravity-institute.github.io/publications/#65ab954dcc002026-03-20T00:00:00ZF. Acernese et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2603.20342GWTC-4.0: Tests of General Relativity. III. Tests of the Remnantshttps://leuven-gravity-institute.github.io/publications/#ec85c364fa252026-03-19T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2603.19021GWTC-4.0: Tests of General Relativity. II. Parameterized Testshttps://leuven-gravity-institute.github.io/publications/#e87d29039f232026-03-19T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2603.19020GWTC-4.0: Tests of General Relativity. I. Overview and General Testshttps://leuven-gravity-institute.github.io/publications/#f2ec064f7fec2026-03-19T00:00:00ZA.G. Abac et al. (incl. T.G.F. Li, M. Wils, I.C.F. Wong) — arXiv:2603.19019