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4 results for “GW150914”
Simulation of GW150914 binary black hole merger using the Einstein Toolkit
<p>On February 11, 2016, the LIGO collaboration announced that they had achieved the first ever direct detection of gravitational waves. The gravitational waves – which were detected by both LIGO detectors on September 14, 2015 at 09:51 UTC – were generated over a billion years ago by the merger of a binary black hole system. The announcement came along with the simultaneous publication of a peer-reviewed paper [Phys. Rev. Lett. 116, 061102]; several other papers giving technical details; and a full release of the data from the detection, which has been given the name GW150914.</p> <p>The LIGO analysis found that the merger consisted of a 36 + 29 solar mass binary black hole system, the remnant was a 62 solar mass black hole, and the remaining 3 solar masses were radiated as gravitational waves. This dataset represents a subset of the data from a simulation in which the Einstein Toolkit was used to evolve the last 6 orbits and merger of a binary black hole system with parameters that match the GW150914 event.</p> <p>More details on the simulation, including instructions for how to run it and how to analyse the data can be found in the Einstein Toolkit gallery at http://einsteintoolkit.org/about/gallery/gw150914/.</p>
Revisiting the ringdown of GW150914
<p>Data release for our publication on "Revisiting the ringdown of GW150914." Released files include posterior samples for all ringdown parameter estimation runs used in the paper. We also include a Jupyter notebook that reproduces plots in the paper from these data (<em>paper_plots.ipynb</em>), as well as a Jupyter notebook that replicates an individual ringdown analysis like those that produced the enclosed parameter estimation results (<em>GW150914_sample_analysis.ipynb</em>).</p> <p>Code associated with this release is also made available through GitHub <a href="https://github.com/maxisi/gw150914-ringdown">here</a>.</p>
Posterior samples for "Searching for a Ringdown Overtone in GW150914"
<p>Posterior files associated with <em>Searching for a Ringdown Overtone in GW150914 </em>(<a href="https://arxiv.org/abs/2205.07809">arXiv:2205.07809</a>, <a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.106.043005">Phys. Rev. D 106, 043005</a>).</p> <p>We provide samples for both the GW150914 analysis (<code>posterior_samples/GW150914</code>) and the injection campaign (<code>posterior_samples/injection_campaign</code>). For the GW150914 analysis, where multiple models were used, the folder naming follows the convention:</p> <p><code>{number of wavelets included in the model}W{QNM content described by lmn indices}</code></p> <p>with the kerr-deviation analysis having the additional label <code>_with_deviation</code>.</p> <p>Only the <code>3W220221</code> model was used in the injection campaign. There, subfolders are named according to the injection time in seconds (where <code>m</code> indicates a minus value, relative to t_ref as detailed in the paper). The exception is the noiseless injection, which is in the <code>noiseless</code> folder.</p> <p>Each directory contains a <code>posterior_samples.dat</code> file and a <code>sampler_output.json</code> file which contains the log-evidence (natural log) and the estimated error on the log-evidence.</p> <p>Notebooks to reproduce the figures in the paper are available in the <code>plots</code> folder.<br> </p>
Comment on "Analysis of Ringdown Overtones in GW150914"
<p>Data release for Comment on “Analysis of Ringdown Overtones in GW150914” (https://github.com/maxisi/gw150914_rd_comment)</p>
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