Consistent Gravitational-wave Echo Candidate in GW150914: Appendix-A Reproducible Analysis
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| author | Barros, Eurian |
| author_facet | Barros, Eurian |
| contents | <p>We present a reproducible, model-independent reanalysis of the first gravitational-wave event, <strong>GW150914</strong>, focused on the search for post-ringdown echoes.<br>Following the Appendix-A forecast protocol (whitening, bandpass filtering, line removal, damped-echo templates, grid scanning, and time-slide background estimation), we investigate three independent conditioning/windowing families.</p> <ul> <li> <p><strong>Family 1</strong> yields a <strong>consistent echo candidate</strong> with parameters τ ≃ 14 ms, f ≃ 180 Hz, and local significance p ≃ 0.016 (false alarm rate ≈ 1.0×10⁻³ Hz).</p> </li> <li> <p><strong>Families 2 and 3</strong> return weaker, noise-consistent results.</p> </li> <li> <p>The pooled global significance across all families is p ≃ 0.27, corresponding to FAR ≈ 1.7×10⁻² Hz.</p> </li> </ul> <p>While not detection-level, this analysis establishes <strong>GW150914 as the only event with a reproducible and consistent echo candidate</strong> in our tests.<br>All datasets, scripts, and outputs (JSON, CSV, figures, README, pooled package) are openly released to enable full <strong>independent verification and benchmarking</strong> by the community.</p> <p>This raises an important open question: <strong>why did such a consistent candidate in GW150914 remain overlooked in previous analyses?</strong><br>We suggest that differences in pipeline configurations, statistical conventions, and the focus on high-threshold detections may have contributed.<br>By releasing this fully reproducible package, we invite the scientific community to <strong>revisit GW150914 with fresh perspectives and independent checks</strong>.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_16945945 |
| institution | Zenodo |
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| publishDate | 2025 |
| publisher | Zenodo |
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| spellingShingle | Consistent Gravitational-wave Echo Candidate in GW150914: Appendix-A Reproducible Analysis Barros, Eurian gravitational waves GW150914 black holes post-ringdown echoes gravitational-wave data analysis reproducibility model-independent search open science LIGO Virgo KAGRA GWOSC Astrophysics – High Energy Astrophysical Phenomena (astro-ph.HE) General Relativity and Quantum Cosmology (gr-qc) High Energy Physics – Phenomenology (hep-ph) Data Analysis, Statistics and Probability (physics.data-an) Open Science & Reproducible Research <p>We present a reproducible, model-independent reanalysis of the first gravitational-wave event, <strong>GW150914</strong>, focused on the search for post-ringdown echoes.<br>Following the Appendix-A forecast protocol (whitening, bandpass filtering, line removal, damped-echo templates, grid scanning, and time-slide background estimation), we investigate three independent conditioning/windowing families.</p> <ul> <li> <p><strong>Family 1</strong> yields a <strong>consistent echo candidate</strong> with parameters τ ≃ 14 ms, f ≃ 180 Hz, and local significance p ≃ 0.016 (false alarm rate ≈ 1.0×10⁻³ Hz).</p> </li> <li> <p><strong>Families 2 and 3</strong> return weaker, noise-consistent results.</p> </li> <li> <p>The pooled global significance across all families is p ≃ 0.27, corresponding to FAR ≈ 1.7×10⁻² Hz.</p> </li> </ul> <p>While not detection-level, this analysis establishes <strong>GW150914 as the only event with a reproducible and consistent echo candidate</strong> in our tests.<br>All datasets, scripts, and outputs (JSON, CSV, figures, README, pooled package) are openly released to enable full <strong>independent verification and benchmarking</strong> by the community.</p> <p>This raises an important open question: <strong>why did such a consistent candidate in GW150914 remain overlooked in previous analyses?</strong><br>We suggest that differences in pipeline configurations, statistical conventions, and the focus on high-threshold detections may have contributed.<br>By releasing this fully reproducible package, we invite the scientific community to <strong>revisit GW150914 with fresh perspectives and independent checks</strong>.</p> |
| title | Consistent Gravitational-wave Echo Candidate in GW150914: Appendix-A Reproducible Analysis |
| topic | gravitational waves GW150914 black holes post-ringdown echoes gravitational-wave data analysis reproducibility model-independent search open science LIGO Virgo KAGRA GWOSC Astrophysics – High Energy Astrophysical Phenomena (astro-ph.HE) General Relativity and Quantum Cosmology (gr-qc) High Energy Physics – Phenomenology (hep-ph) Data Analysis, Statistics and Probability (physics.data-an) Open Science & Reproducible Research |
| url | https://doi.org/10.5281/zenodo.16945945 |