Directed search for gravitational waves from Scorpius X-1 with initial LIGO data

We present results of a search for continuously emitted gravitational radiation, directed at the brightest low-mass x-ray binary, Scorpius X-1. Our semicoherent analysis covers 10 days of LIGO S5 data ranging from 50–550 Hz, and performs an incoherent sum of coherent F -statistic power distributed a...

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Autores principales:	Aasi, J., Abbott, B. P., Abbott, R., Abbott, T., Abernathy, M. R., Acernese, F., Domínguez, Alfredo Eduardo, Maglione, César Germán, Ortega Larcher, Walter Emanuel, Quiroga, Gonzalo Damián, Reula, Oscar Alejandro
Formato:	article
Lenguaje:	Inglés
Publicado:	2022
Materias:	Gravitational waves Neutron stars X-ray binaries General Relativity and Quantum Cosmology Astrophysics High Energy Astrophysical Phenomena
Acceso en línea:	http://hdl.handle.net/11086/29514 https://doi.org/10.1103/PhysRevD.91.062008
Aporte de:	Repositorio Digital Universitario (UNC) de Universidad Nacional de Córdoba

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institution	Universidad Nacional de Córdoba
institution_str	I-10
repository_str	R-141
collection	Repositorio Digital Universitario (UNC)
language	Inglés
topic	Gravitational waves Neutron stars X-ray binaries General Relativity and Quantum Cosmology Astrophysics High Energy Astrophysical Phenomena
spellingShingle	Gravitational waves Neutron stars X-ray binaries General Relativity and Quantum Cosmology Astrophysics High Energy Astrophysical Phenomena Aasi, J. Abbott, B. P. Abbott, R. Abbott, T. Abernathy, M. R. Acernese, F. Domínguez, Alfredo Eduardo Maglione, César Germán Ortega Larcher, Walter Emanuel Quiroga, Gonzalo Damián Reula, Oscar Alejandro Directed search for gravitational waves from Scorpius X-1 with initial LIGO data
topic_facet	Gravitational waves Neutron stars X-ray binaries General Relativity and Quantum Cosmology Astrophysics High Energy Astrophysical Phenomena
description	We present results of a search for continuously emitted gravitational radiation, directed at the brightest low-mass x-ray binary, Scorpius X-1. Our semicoherent analysis covers 10 days of LIGO S5 data ranging from 50–550 Hz, and performs an incoherent sum of coherent F -statistic power distributed amongst frequency-modulated orbital sidebands. All candidates not removed at the veto stage were found to be consistent with noise at a 1% false alarm rate. We present Bayesian 95% confidence upper limits on gravitational-wave strain amplitude using two different prior distributions: a standard one, with no a priori assumptions about the orientation of Scorpius X-1; and an angle-restricted one, using a prior derived from electromagnetic observations. Median strain upper limits of 1.3 × 10−24 and 8 × 10−25 are reported at 150 Hz for the standard and angle-restricted searches respectively. This proof-of-principle analysis was limited to a short observation time by unknown effects of accretion on the intrinsic spin frequency of the neutron star, but improves upon previous upper limits by factors of ∼1.4 for the standard, and 2.3 for the angle-restricted search at the sensitive region of the detector.
format	article
author	Aasi, J. Abbott, B. P. Abbott, R. Abbott, T. Abernathy, M. R. Acernese, F. Domínguez, Alfredo Eduardo Maglione, César Germán Ortega Larcher, Walter Emanuel Quiroga, Gonzalo Damián Reula, Oscar Alejandro
author_facet	Aasi, J. Abbott, B. P. Abbott, R. Abbott, T. Abernathy, M. R. Acernese, F. Domínguez, Alfredo Eduardo Maglione, César Germán Ortega Larcher, Walter Emanuel Quiroga, Gonzalo Damián Reula, Oscar Alejandro
author_sort	Aasi, J.
title	Directed search for gravitational waves from Scorpius X-1 with initial LIGO data
title_short	Directed search for gravitational waves from Scorpius X-1 with initial LIGO data
title_full	Directed search for gravitational waves from Scorpius X-1 with initial LIGO data
title_fullStr	Directed search for gravitational waves from Scorpius X-1 with initial LIGO data
title_full_unstemmed	Directed search for gravitational waves from Scorpius X-1 with initial LIGO data
title_sort	directed search for gravitational waves from scorpius x-1 with initial ligo data
publishDate	2022
url	http://hdl.handle.net/11086/29514 https://doi.org/10.1103/PhysRevD.91.062008
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Directed search for gravitational waves from Scorpius X-1 with initial LIGO data

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