Directional limits on persistent gravitational waves using LIGO S5 science data

J. Abadie; N. A. Lockerbie; K. V. Tokmakov; LIGO Scientific Collaboration; Virgo Collaboration

doi:10.1103/PhysRevLett.107.271102

Directional limits on persistent gravitational waves using LIGO S5 science data

J. Abadie, N. A. Lockerbie, K. V. Tokmakov, LIGO Scientific Collaboration, Virgo Collaboration

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Abstract

The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2 - 20 x 10(-50) strain(2) Hz(-1) and 5 - 35 x 10(-49) strain(2) Hz(-1) sr(-1) for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as approximate to 7 - 10(-25) in the most sensitive frequency range near 160 Hz.

Original language	English
Article number	271102
Number of pages	9
Journal	Physical Review Letters
Volume	107
Issue number	27
DOIs	https://doi.org/10.1103/PhysRevLett.107.271102
Publication status	Published - 29 Dec 2011

Keywords

LIGO S5
gravitational waves
stochastic analysis

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10.1103/PhysRevLett.107.271102

Abadie-etal-PRL2011-Directional-limits-persistent-gravitational-waves-LIGO-S5-science-dataFinal published version, 636 KB

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title = "Directional limits on persistent gravitational waves using LIGO S5 science data",

abstract = "The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2 - 20 x 10(-50) strain(2) Hz(-1) and 5 - 35 x 10(-49) strain(2) Hz(-1) sr(-1) for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as approximate to 7 - 10(-25) in the most sensitive frequency range near 160 Hz.",

keywords = "LIGO S5 , gravitational waves , stochastic analysis",

author = "J. Abadie and Lockerbie, {N. A.} and Tokmakov, {K. V.} and {LIGO Scientific Collaboration} and {Virgo Collaboration}",

note = "J. Abadie et al. (LIGO Scientific Collaboration, Virgo Collaboration) Phys. Rev. Lett. 107, 271102. {\textcopyright} 2011 American Physical Society",

year = "2011",

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doi = "10.1103/PhysRevLett.107.271102",

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AU - Abadie, J.

AU - Lockerbie, N. A.

AU - Tokmakov, K. V.

AU - LIGO Scientific Collaboration

AU - Virgo Collaboration

PY - 2011/12/29

Y1 - 2011/12/29

N2 - The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2 - 20 x 10(-50) strain(2) Hz(-1) and 5 - 35 x 10(-49) strain(2) Hz(-1) sr(-1) for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as approximate to 7 - 10(-25) in the most sensitive frequency range near 160 Hz.

AB - The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2 - 20 x 10(-50) strain(2) Hz(-1) and 5 - 35 x 10(-49) strain(2) Hz(-1) sr(-1) for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as approximate to 7 - 10(-25) in the most sensitive frequency range near 160 Hz.

KW - LIGO S5

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KW - stochastic analysis

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JO - Physical Review Letters

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IS - 27

M1 - 271102

ER -

Directional limits on persistent gravitational waves using LIGO S5 science data

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