Method for removing signal contamination during significance estimation of a GstLAL analysis

Prathamesh Joshi, Leo Tsukada, Chad Hanna

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To evaluate the probability of a gravitational-wave candidate originating from noise, GstLAL collects noise statistics from the data it analyzes. Gravitational-wave signals of astrophysical origin get added to the noise statistics, harming the sensitivity of the search. We present the background filter, a novel tool to prevent this by removing noise statistics that were collected from gravitational-wave candidates. To demonstrate its efficacy, we analyze one week of LIGO and Virgo O3 data, and show that it improves the sensitivity of the analysis by 20%-40% in the high mass region, in the presence of 868 simulated gravitational-wave signals. With the upcoming fourth observing run of LIGO, Virgo, and KAGRA expected to yield a high rate of gravitational-wave detections, we expect the background filter to be an important tool for increasing the sensitivity of a GstLAL analysis.

Original languageEnglish (US)
Article number084032
JournalPhysical Review D
Issue number8
StatePublished - Oct 15 2023

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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