Journal
PHYSICAL REVIEW D
Volume 100, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.100.122002
Keywords
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Funding
- EGO consortium
- Council of Scientific and Industrial Research of India
- Department of Science and Technology, India
- ScienceAMP
- Engineering Research Board, India
- Ministry of Human Resource Development, India
- Spanish Agencia Estatal de Investigacion
- Vicepresidencia i Conselleria d'Innovacio, Recerca i Turisme
- Conselleria d'Educacio i Universitat del Govern de les Illes Balears
- Conselleria d'Educacio, Investigacio, Cultura i Esport de la Generalitat Valenciana
- National Science Centre of Poland
- Swiss National Science Foundation
- Russian Foundation for Basic Research
- Russian Science Foundation
- European Commission
- European Regional Development Funds
- Royal Society
- Scottish Funding Council
- Scottish Universities Physics Alliance
- Hungarian Scientific Research Fund
- Paris Ile-de-France Region
- National Research, Development and Innovation Office Hungary
- National Research Foundation of Korea
- Province of Ontario through the Ministry of Economic Development and Innovation
- Natural Science and Engineering Research Council Canada
- Canadian Institute for Advanced Research
- Brazilian Ministry of Science, Technology, Innovations, and Communications
- International Center for Theoretical Physics South American Institute for Fundamental Research
- Research Grants Council of Hong Kong
- National Natural Science Foundation of China
- Leverhulme Trust
- Research Corporation
- Ministry of Science and Technology, Taiwan
- Kavli Foundation
- Lyon Institute of Origins
- Industry Canada through the Ministry of Economic Development and Innovation
- EPSRC [2161515] Funding Source: UKRI
- STFC [ST/J00166X/1, ST/S000550/1, 1947199, ST/N000072/1, ST/K005014/1, PPA/G/S/2002/00652, ST/N00003X/1, ST/M005844/1, 1945971, ST/V001396/1, ST/K005014/2, ST/R00045X/1, 1802888, 1938553, ST/N000633/1, 1653089, ST/I006269/1, ST/K000845/1, ST/N005422/1, 2142081, 1947165, ST/S000305/1, ST/H002006/1, 2039699] Funding Source: UKRI
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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 h(0)(95%) = 3.47 x 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.
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