Dataset Open Access

# GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run — Candidate data release

LIGO Scientific Collaboration and Virgo Collaboration and KAGRA Collaboration

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{
"description": "<p>This material is part of several data products associated with GWTC-3, the third Gravitational-Wave Transient Catalog from the <a href=\"https://www.ligo.org/\">LIGO</a> Scientific Collaboration, the <a href=\"https://www.virgo-gw.eu/\">Virgo</a> Collaboration, and the <a href=\"https://gwcenter.icrr.u-tokyo.ac.jp/en/\">KAGRA</a> Collaboration. For more information, see the paper (<a href=\"https://dcc.ligo.org/LIGO-P2000318/public\">dcc.ligo.org/LIGO-P2000318/public</a>), the related material linked from this page, and the GWTC-3 data release documentation (<a href=\"https://www.gw-openscience.org/GWTC-3/\">www.gw-openscience.org/GWTC-3/</a>).</p>\n\n<p><strong>Candidate data release</strong></p>\n\n<p>Data associated with candidates in GWTC-3. These are gravitational-wave candidates from the&nbsp;the third observing run (O3) of the Advanced LIGO and Advanced Virgo detectors that pass a false alarm rate threshold of 2/day. We upload a tar file (search_data.tar.gz) containing all the data and a python notebook (GWTC3_search_data.ipynb) that provides a description on how to use the files contained in the dataset.</p>\n\n<p>Associated with each candidate are the search analysis results and a localization (assuming that the source is astrophysical). Four search analysis pipelines have been used: the templated-based <a href=\"https://lscsoft.docs.ligo.org/gstlal/\">GstLAL</a>, <a href=\"https://doi.org/10.1088/1361-6382/abe913\">MBTA</a> and <a href=\"https://pycbc.org/\">PyCBC</a>, plus the template-free <a href=\"https://gwburst.gitlab.io/\">cWB</a>. Localizations from the template-based pipelines are calculated using <a href=\"https://lscsoft.docs.ligo.org/ligo.skymap/bayestar/index.html\">Bayestar</a>, while cWB candidates are calculated by cWB itself.</p>\n\n<p>This release is primarily composed of results from the second part of O3 (O3b), but also includes a subset of results&nbsp;from the first part (O3a). A similar release was made for the previous <a href=\"https://doi.org/10.5281/zenodo.5117761\">GWTC-2.1</a>&nbsp;that&nbsp;contained candidates from the first part of O3 (O3a)&nbsp;from GstLAL, MBTA and PyCBC. We include updated probabilities of astrophysical origin for these candidates: each search analysis has a o3a_pastro directory that contains these results. Since GWTC-2.1 did not include cWB results, this release includes cWB O3a candidates in addition to O3b:&nbsp;the cWB directory contains a subdirectory called o3a_events that contains the O3a results.</p>\n\n<p>The probability of astrophysical origin is calculated assuming a compact binary coalescence source, which may not always be appropriate for&nbsp;the template-free cWB analysis.</p>\n\n<p>&nbsp;&nbsp;</p>\n\n<p>For more general background on gravitational-wave search analysis and sky maps, try the materials from a <a href=\"https://www.gw-openscience.org/workshops/\">GW Open Data Workshop</a> or the <a href=\"https://doi.org/10.1088/1361-6382/ab685e\">guide to LIGO&ndash;Virgo data analysis</a>.</p>",
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"name": "LIGO Scientific Collaboration and Virgo Collaboration and KAGRA Collaboration"
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"url": "https://zenodo.org/record/5546665",
"datePublished": "2021-11-08",
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"identifier": "https://doi.org/10.5281/zenodo.5546665",
"@id": "https://doi.org/10.5281/zenodo.5546665",
"@type": "Dataset",
"name": "GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run \u2014 Candidate data release"
}
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