A directed search for gravitational waves from Scorpius X-1 with initial LIGO

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dc.contributor.author Sengupta, Anand
dc.date.accessioned 2014-12-18T09:27:41Z
dc.date.available 2014-12-18T09:27:41Z
dc.date.issued 2014-12
dc.identifier.citation Sengupta, Anand et al., “A directed search for gravitational waves from Scorpius X-1 with initial LIGO”, arXiv, Cornell University Library, DOI: arXiv:1412.0605, Dec 2014. en_US
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1501
dc.identifier.uri http://arxiv.org/abs/1412.0605
dc.description.abstract We present results of a search for continuously-emitted gravitational radiation, directed at the brightest low-mass X-ray binary, Scorpius X-1. Our semi-coherent 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 1.3e-24 and 8e-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. en_US
dc.description.statementofresponsibility by Anand Sengupta et al.
dc.language.iso en en_US
dc.publisher Cornell University Library en_US
dc.subject General Relativity en_US
dc.subject High Energy Astrophysical Phenomena en_US
dc.subject Quantum Cosmology en_US
dc.title A directed search for gravitational waves from Scorpius X-1 with initial LIGO en_US
dc.type Article en_US

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