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- W4381573857 abstract "In this study, we investigate the impact of microlensing on gravitational wave (GW) signals in the LIGO$-$Virgo sensitivity band. Microlensing caused by an isolated point lens, with (redshifted) mass ranging from $M_mathrm{Lz}in(1,10^5){rm M}_odot$ and impact parameter $yin (0.01,~5)$, can result in a maximum mismatch of $sim 30%$ with their unlensed counterparts. When $y<1$, it strongly anti-correlates with the luminosity distance enhancing the detection horizon and signal-to-noise ratio (SNR). Biases in inferred source parameters are assessed, with in-plane spin components being the most affected intrinsic parameters. The luminosity distance is often underestimated, while sky-localisation and trigger times are mostly well-recovered. Study of a population of microlensed signals due to an isolated point lens primarily reveals: (i) using unlensed templates during the search causes fractional loss ($20%$ to $30%$) of potentially identifiable microlensed signals; (ii) the observed distribution of $y$ challenges the notion of its high improbability at low values ($ylesssim 1$), especially for $ylesssim 0.1$; (iii) Bayes factor analysis of the population indicates that certain region in $M_mathrm{Lz}-y$ parameter space have a higher probability of being detected and accurately identified as microlensed. Notably, the microlens parameters for the most compelling candidate identified in previous microlensing searches, GW200208_130117, fall within a 1-sigma range of the aforementioned higher probability region. Identifying microlensing signatures from $M_mathrm{Lz}<100~$M$_odot$ remains challenging due to small microlensing effects at typical SNR values. Additionally, we also examined how microlensing from a population of microlenses influences the detection of strong lensing signatures in pairs of GW events, particularly in the posterior-overlap analysis." @default.
- W4381573857 created "2023-06-22" @default.
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- W4381573857 date "2023-06-20" @default.
- W4381573857 modified "2023-09-27" @default.
- W4381573857 title "Exploring the Impact of Microlensing on Gravitational Wave Signals: Biases, Population Characteristics, and Prospects for Detection" @default.
- W4381573857 doi "https://doi.org/10.48550/arxiv.2306.11479" @default.
- W4381573857 hasPublicationYear "2023" @default.
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