GWTC-4.0: Data Quality Products for Transient Gravitational Wave Searches

This material is part of the data release associated with version 4.0 of the Gravitational-Wave Transient Catalog (GWTC-4.0), from the LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration. For more information, see the papers describing the catalog (introduction, methods, results), the related material linked from this page, and the GWTC-4.0 data release documentation (www.gw-openscience.org/GWTC-4.0/). Data Quality Products for Transient Gravitational Wave Searches The alternate strain release data available on the Gravitational Wave Open Science Center contains data-quality products produced by an online configuration of iDQ, namely the channels IDQ-OK_OVL_10_2048_AR: OK flag IDQ-RANK_OVL_10_2048_AR: rank IDQ-FAP_OVL_10_2048_AR: false alarm probability IDQ-EFF_OVL_10_2048_AR: efficiency IDQ-LOGLIKE_OVL_10_2048_AR: log likelihood ratio iDQ uses machine learning to predict the probability that a non-Gaussian transient is present using information from auxiliary channels. This release contains the offline iDQ data products for O4a data, which are used by offline search analyses to help mitigate non-Gaussian noise in the detector data. We package the iDQ timeseries in a compressed file format (.tar.gz). Once unpacked, the data is separated by detector and then stored in separate gravitational-wave frame files (.gwf) with channels: IDQ-PGLITCH_OVL_10_2048: probability of the presence of non-Gaussian noise artifacts IDQ-LOGLIKE_OVL_10_2048: log-likelihood-ratio IDQ-EFF_OVL_10_2048: efficiency IDQ-FAP_OVL_10_2048: false alarm probability IDQ-RANK_OVL_10_2048: rank IDQ-OK_OVL_10_2048: iDQ data products are reliable Note: the gated files (another data quality product) are now available via the Gravitational Wave Open Science Center: gwosc.org/timeline/ How to download all files from this page If you would like to download all files on this page, we recommend zenodo_get: pip install zenodo_get zenodo-get RECORD_ID_OR_DOI Futher information For more general background on gravitational-wave data quality, try the materials from a GW Open Data Workshop or the guide to LIGO–Virgo data analysis.