Document Type

Article

Publication Date

12-4-2020

Abstract

We present results from a semicoherent search for continuous gravitational waves from the low-mass x-ray binary Scorpius X-1, using a hidden Markov model (HMM) to track spin wandering. This search improves on previous HMM-based searches of LIGO data by using an improved frequency domain matched filter, the J-statistic, and by analyzing data from Advanced LIGO’s second observing run. In the frequency range searched, from 60 to 650 Hz, we find no evidence of gravitational radiation. At 194.6 Hz, the most sensitive search frequency, we report an upper limit on gravitational wave strain (at 95% confidence) of h95%0=3.47×10−25 when marginalizing over source inclination angle. This is the most sensitive search for Scorpius X-1, to date, that is specifically designed to be robust in the presence of spin wandering.

Journal Title

Physical Review D

Volume

100

Issue

122002

DOI

https://doi.org/10.1103/PhysRevD.100.122002

First Department

Physics

Acknowledgements

Retrieved 8/19/2020 from https://arxiv.org/pdf/1906.12040.pdf

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