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arxiv 2411.12453 v1 pith:YN73XIEC submitted 2024-11-19 gr-qc astro-ph.HE

Using time series to identify strongly-lensed gravitational waves with deep learning

classification gr-qc astro-ph.HE
keywords timemodelphasecopiesdatagravitationalinputlensing
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The presence of a massive body between the Earth and a gravitational-wave source will produce the so-called gravitational lensing effect. In the case of strong lensing, it leads to the observation of multiple deformed copies of the initial wave. Machine-learning (ML) models have been proposed for identifying these copies much faster than optimal Bayesian methods, as will be needed with the detection rate of next-generation detector. Most of these ML models are based on a time-frequency representation of the data that discards the phase information. We introduce a neural network that directly uses the time series data to retain the phase, limit the pre-processing time and keep a one-dimensional input. We show that our model is more efficient than the base model used on time-frequency maps at any False Alarm Rate (FPR), up to $\sim 5$ times more for an FPR of $10^{-4}$. We also show that it is not significantly impacted by the choice of waveform model, by lensing-induced phase shifts and by reasonable errors on the merger time that induce a misalignment of the waves in the input.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Search for strong lensing of gravitational waves in the binary black hole events from O1-O4a

    gr-qc 2026-07 accept novelty 6.0

    Posterior Overlap 2.0 finds no lensed BBH pairs in O1–O4a (p_L < 0.6% for all pairs) and sets a 90% upper bound of 1.4% on the strong-lensing fraction.