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  Loosely coherent search in LIGO O1 data for continuous gravitational waves from Terzan 5 and the galactic center

Dergachev, V., Papa, M. A., Steltner, B., & Eggenstein, H.-B. (2019). Loosely coherent search in LIGO O1 data for continuous gravitational waves from Terzan 5 and the galactic center. Physical Review D, 99(8): 084048. doi:10.1103/PhysRevD.99.084048.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-23E0-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-9EFC-0
Genre: Journal Article

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 Creators:
Dergachev, Vladimir1, Author              
Papa, Maria Alessandra2, Author              
Steltner, Benjamin1, Author              
Eggenstein, Heinz-Bernd3, Author              
Affiliations:
1Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2630691              
2Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              
3Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: We report results of a search for continuous gravitational waves from a region covering the globular cluster Terzan 5 and the galactic center. Continuous gravitational waves are expected from fast-spinning, slightly non-axisymmetric isolated neutron stars as well as more exotic objects. The regions that we target are believed to be unusually abundant in neutron stars. We use a new loosely coherent search method that allows to reach unprecedented levels of sensitivity for this type of search. The search covers the frequency band 475-1500 Hz and frequency time derivatives in the range of [-3e-8, +1e-9] Hz/s, which is a parameter range not explored before with the depth reached by this search. As to be expected with only a few months of data from the same observing run, it is very difficult to make a confident detection of a continuous signal over such a large parameter space. A list of parameter space points that passed all the thresholds of this search is provided. We follow-up the most significant outlier on the newly released O2 data and cannot confirm it. We provide upper limits on the gravitational wave strength of signals as a function of signal frequency.

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 Dates: 2019-03-062019
 Publication Status: Published in print
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 Identifiers: arXiv: 1903.02389
URI: http://arxiv.org/abs/1903.02389
DOI: 10.1103/PhysRevD.99.084048
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 99 (8) Sequence Number: 084048 Start / End Page: - Identifier: -