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Leveraging Time-Dependent Instrumental Noise for LISA SGWB Analysis

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arxiv 2408.00832 v2 pith:XZZ4H67H submitted 2024-08-01 gr-qc astro-ph.COastro-ph.IMhep-ph

Leveraging Time-Dependent Instrumental Noise for LISA SGWB Analysis

classification gr-qc astro-ph.COastro-ph.IMhep-ph
keywords noisedataanalysisfluctuationsinformationinstrumentallisaoptimal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Variations in the instrumental noise of the Laser Interferometer Space Antenna (LISA) over time are expected as a result of e.g. scheduled satellite operations or unscheduled glitches. We demonstrate that these fluctuations can be leveraged to improve the sensitivity to stochastic gravitational wave backgrounds (SGWBs) compared to the stationary noise scenario. This requires optimal use of data segments with downward noise fluctuations, and thus a data analysis pipeline capable of analysing and combining shorter time segments of mission data. We propose that simulation based inference is well suited for this challenge. In an approximate, but state-of-the-art, modeling setup, we show by comparison with Fisher Information Matrix estimates that the optimal information gain can be achieved in practice.

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Cited by 3 Pith papers

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