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A search of the Orion spur for continuous gravitational waves using a "loosely coherent" algorithm on data from LIGO interferometers

The LIGO Scientific Collaboration, The Virgo Collaboration, Aasi, J., Abbott, B. P., Abbott, R., Abbott, T. D., et al. (2016). A search of the Orion spur for continuous gravitational waves using a "loosely coherent" algorithm on data from LIGO interferometers. Physical Review D, 93: 042006. doi:10.1103/PhysRevD.93.042006.

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Creators:
The LIGO Scientific Collaboration, Author
The Virgo Collaboration, Author
Aasi, J., Author
Abbott, B. P., Author
Abbott, R., Author
Abbott, T. D., Author
Abernathy, M. R., Author
Acernese, F., Author
Ackley, K., Author
Affeldt, Christoph1, Author
Agathos, M., Author
Agatsuma, K., Author
Aggarwal, N., Author
Aguiar, O. D., Author
Ain, A., Author
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011
3Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290
4Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
Abstract: We report results of a wideband search for periodic gravitational waves from isolated neutron stars within the Orion spur towards both the inner and outer regions of our Galaxy. As gravitational waves interact very weakly with matter, the search is unimpeded by dust and concentrations of stars. One search disk (A) is $6.87^\circ$ in diameter and centered on $20^\textrm{h}10^\textrm{m}54.71^\textrm{s}+33^\circ33'25.29"$, and the other (B) is $7.45^\circ$ in diameter and centered on $8^\textrm{h}35^\textrm{m}20.61^\textrm{s}-46^\circ49'25.151"$. We explored the frequency range of 50-1500 Hz and frequency derivative from $0$ to $-5\times 10^{-9}$ Hz/s. A multi-stage, loosely coherent search program allowed probing more deeply than before in these two regions, while increasing coherence length with every stage. Rigorous followup parameters have winnowed initial coincidence set to only 70 candidates, to be examined manually. None of those 70 candidates proved to be consistent with an isolated gravitational wave emitter, and 95% confidence level upper limits were placed on continuous-wave strain amplitudes. Near $169$ Hz we achieve our lowest 95% CL upper limit on worst-case linearly polarized strain amplitude $h_0$ of $6.3\times 10^{-25}$, while at the high end of our frequency range we achieve a worst-case upper limit of $3.4\times 10^{-24}$ for all polarizations and sky locations.

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Dates: 2015-10-122015-10-142016
Publication Status: Published in print
Pages: Fixed minor typo - duplicate name in the author list
Publishing info: -
Rev. Method: -
Identifiers: arXiv: 1510.03474
URI: http://arxiv.org/abs/1510.03474
DOI: 10.1103/PhysRevD.93.042006
Degree: -

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Title: Physical Review D
Other : Phys. Rev. D.
Source Genre: Journal
Creator(s):
Affiliations:
Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 93 Sequence Number: 042006 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258