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Browsing Environment Institute by Author "Abadie, J."
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Item Open Access All-sky search for gravitational-wave bursts in the second joint LIGO-Virgo run(American Physical Society, 2012) Abadie, J.; Abbott, B.; Abbott, R.; Abbott, T.; Abernathy, M.; Accadia, T.; Acernese, F.; Adams, C.; Adhikari, R.; Affeldt, C.; Agathos, M.; Agatsuma, K.; Ajith, P.; Allen, B.; Amador Ceron, E.; Amariutei, D.; Anderson, S.; Anderson, W.; Arai, K.; Arain, M.; et al.We present results from a search for gravitational-wave bursts in the data collected by the LIGO and Virgo detectors between July 7, 2009 and October 20, 2010: data are analyzed when at least two of the three LIGO-Virgo detectors are in coincident operation, with a total observation time of 207 days. The analysis searches for transients of duration ≲1 s over the frequency band 64–5000 Hz, without other assumptions on the signal waveform, polarization, direction or occurrence time. All identified events are consistent with the expected accidental background. We set frequentist upper limits on the rate of gravitational-wave bursts by combining this search with the previous LIGO-Virgo search on the data collected between November 2005 and October 2007. The upper limit on the rate of strong gravitational-wave bursts at the Earth is 1.3 events per year at 90% confidence. We also present upper limits on source rate density per year and Mpc3 for sample populations of standard-candle sources. As in the previous joint run, typical sensitivities of the search in terms of the root-sum-squared strain amplitude for these waveforms lie in the range ∼5×10-22 Hz-1/2 to ∼1×10-20 Hz-1/2. The combination of the two joint runs entails the most sensitive all-sky search for generic gravitational-wave bursts and synthesizes the results achieved by the initial generation of interferometric detectors.Item Open Access Directional limits on persistent gravitational waves using LIGO S5 science data(American Physical Soc, 2011) Abadie, J.; Hosken, D.; Munch, J.; Ottaway, D.; Veitch, P.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 2-20×10⁻⁵⁰ strain² Hz⁻¹ and 5-35×10⁻⁴⁹ strain² 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 ≈7×10⁻²⁵ in the most sensitive frequency range near 160 Hz.Item Open Access Erratum: Search for gravitational waves associated with the August 2006 timing glitch of the Vela pulsar (Physical Review D (2011);83(6)(042001))(American Physical Society, 2011) Abadie, J.; Hosken, D.; Hough, J.; Munch, J.; Murray, P.; Ottaway, D.; Ottens, R.; Veitch, P.This paper was published online on 1 February 2011 with an error in the author list. S. Buchner was erroneously included as part of the Collaboration, but should be listed separately. The paper has been corrected as of 2 March 2011. The text is correct in the printed version of the journal.Item Open Access Erratum: Search for gravitational waves from binary black hole inspiral, merger, and ringdown [Phys. Rev. D 83, 122005 (2011)](American Physical Society, 2012) Abadie, J.; Hosken, D.; Hough, J.; Munch, J.; Murray, P.; Ottaway, D.; Ottens, R.; Veitch, P.