{"work":{"id":"642e86b9-e3ac-4047-aca4-761cb674b6d2","openalex_id":null,"doi":null,"arxiv_id":"2508.18081","raw_key":null,"title":"GWTC-4.0: Methods for Identifying and Characterizing Gravitational-wave Transients","authors":null,"authors_text":"The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration: A. G. Abac, I. Abouelfettouh, F. Acernese, K. Ackley","year":2025,"venue":"gr-qc","abstract":"The Gravitational-Wave Transient Catalog (GWTC) is a collection of candidate gravitational-wave transient signals identified and characterized by the LIGO-Virgo-KAGRA Collaboration. Producing the contents of the GWTC from detector data requires complex analysis methods. These comprise techniques to model the signal; identify the transients in the data; evaluate the quality of the data and mitigate possible instrumental issues; infer the parameters of each transient; compare the data with the waveform models for compact binary coalescences; and handle the large amount of results associated with all these different analyses. In this paper, we describe the methods employed to produce the catalog's fourth release, GWTC-4.0, focusing on the analysis of the first part of the fourth observing run of Advanced LIGO, Advanced Virgo and KAGRA.","external_url":"https://arxiv.org/abs/2508.18081","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-05-25T08:05:31.120972+00:00","pith_arxiv_id":"2508.18081","created_at":"2026-05-09T19:10:10.559799+00:00","updated_at":"2026-05-25T08:05:31.120972+00:00","title_quality_ok":true,"display_title":"GWTC-4.0: Methods for Identifying and Characterizing Gravitational-wave Transients","render_title":"GWTC-4.0: Methods for Identifying and Characterizing Gravitational-wave Transients"},"hub":{"state":{"work_id":"642e86b9-e3ac-4047-aca4-761cb674b6d2","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":31,"external_cited_by_count":null,"distinct_field_count":5,"first_pith_cited_at":"2025-07-10T23:52:46+00:00","last_pith_cited_at":"2026-05-20T18:00:01+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-05-31T01:31:54.469102+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":8},{"context_role":"method","n":3}],"polarity_counts":[{"context_polarity":"background","n":8},{"context_polarity":"use_method","n":3}],"runs":{},"summary":{},"graph":{},"authors":[]}}