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

J Aasi, B.P. Abbott, R. Abbott, T. D. Abbott, M R Abernathy, F Acernese, K Ackley, C Adams, T Adams, P Addesso, R X Adhikari, V. B. Adya, C Affeldt, M Agathos, K Agatsuma, N Aggarwal, O D Aguiar, A Ain, P Ajith, B AllenG Ashton, P D Lasky, Y Levin, S S Premachandra, E Thrane, Xingjiang Zhu

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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° in diameter and centered on 20h10m54.71s+33°33′25.29′′, and the other (B) is 7.45° in diameter and centered on 8h35m20.61s-46°49′25.151′′. We explored the frequency range of 50-1500 Hz and frequency derivative from 0 to -5×10-9 Hz/s. A multistage, loosely coherent search program allowed probing more deeply than before in these two regions, while increasing coherence length with every stage. Rigorous follow-up parameters have winnowed the 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% C.L. upper limit on the worst-case linearly polarized strain amplitude h0 of 6.3×10-25, while at the high end of our frequency range we achieve a worst-case upper limit of 3.4×10-24 for all polarizations and sky locations.

Original languageEnglish
Article number042006
Number of pages14
JournalPhysical Review D
Volume93
Issue number4
DOIs
Publication statusPublished - 17 Feb 2016

Cite this

Aasi, J ; Abbott, B.P. ; Abbott, R. ; Abbott, T. D. ; Abernathy, M R ; Acernese, F ; Ackley, K ; Adams, C ; Adams, T ; Addesso, P ; Adhikari, R X ; Adya, V. B. ; Affeldt, C ; Agathos, M ; Agatsuma, K ; Aggarwal, N ; Aguiar, O D ; Ain, A ; Ajith, P ; Allen, B ; Ashton, G ; Lasky, P D ; Levin, Y ; Premachandra, S S ; Thrane, E ; Zhu, Xingjiang. / Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers. In: Physical Review D. 2016 ; Vol. 93, No. 4.
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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° in diameter and centered on 20h10m54.71s+33°33′25.29′′, and the other (B) is 7.45° in diameter and centered on 8h35m20.61s-46°49′25.151′′. We explored the frequency range of 50-1500 Hz and frequency derivative from 0 to -5×10-9 Hz/s. A multistage, loosely coherent search program allowed probing more deeply than before in these two regions, while increasing coherence length with every stage. Rigorous follow-up parameters have winnowed the 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{\%} C.L. upper limit on the worst-case linearly polarized strain amplitude h0 of 6.3×10-25, while at the high end of our frequency range we achieve a worst-case upper limit of 3.4×10-24 for all polarizations and sky locations.",
author = "J Aasi and B.P. Abbott and R. Abbott and Abbott, {T. D.} and Abernathy, {M R} and F Acernese and K Ackley and C Adams and T Adams and P Addesso and Adhikari, {R X} and Adya, {V. B.} and C Affeldt and M Agathos and K Agatsuma and N Aggarwal and Aguiar, {O D} and A Ain and P Ajith and B Allen and G Ashton and Lasky, {P D} and Y Levin and Premachandra, {S S} and E Thrane and Xingjiang Zhu",
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Aasi, J, Abbott, BP, Abbott, R, Abbott, TD, Abernathy, MR, Acernese, F, Ackley, K, Adams, C, Adams, T, Addesso, P, Adhikari, RX, Adya, VB, Affeldt, C, Agathos, M, Agatsuma, K, Aggarwal, N, Aguiar, OD, Ain, A, Ajith, P, Allen, B, Ashton, G, Lasky, PD, Levin, Y, Premachandra, SS, Thrane, E & Zhu, X 2016, 'Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers', Physical Review D, vol. 93, no. 4, 042006. https://doi.org/10.1103/PhysRevD.93.042006

Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers. / Aasi, J; Abbott, B.P.; Abbott, R.; Abbott, T. D.; Abernathy, M R; Acernese, F; Ackley, K; Adams, C; Adams, T; Addesso, P; Adhikari, R X; Adya, V. B.; Affeldt, C; Agathos, M; Agatsuma, K; Aggarwal, N; Aguiar, O D; Ain, A; Ajith, P; Allen, B; Ashton, G; Lasky, P D; Levin, Y; Premachandra, S S; Thrane, E; Zhu, Xingjiang.

In: Physical Review D, Vol. 93, No. 4, 042006, 17.02.2016.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers

AU - Aasi, J

AU - Abbott, B.P.

AU - Abbott, R.

AU - Abbott, T. D.

AU - Abernathy, M R

AU - Acernese, F

AU - Ackley, K

AU - Adams, C

AU - Adams, T

AU - Addesso, P

AU - Adhikari, R X

AU - Adya, V. B.

AU - Affeldt, C

AU - Agathos, M

AU - Agatsuma, K

AU - Aggarwal, N

AU - Aguiar, O D

AU - Ain, A

AU - Ajith, P

AU - Allen, B

AU - Ashton, G

AU - Lasky, P D

AU - Levin, Y

AU - Premachandra, S S

AU - Thrane, E

AU - Zhu, Xingjiang

PY - 2016/2/17

Y1 - 2016/2/17

N2 - 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° in diameter and centered on 20h10m54.71s+33°33′25.29′′, and the other (B) is 7.45° in diameter and centered on 8h35m20.61s-46°49′25.151′′. We explored the frequency range of 50-1500 Hz and frequency derivative from 0 to -5×10-9 Hz/s. A multistage, loosely coherent search program allowed probing more deeply than before in these two regions, while increasing coherence length with every stage. Rigorous follow-up parameters have winnowed the 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% C.L. upper limit on the worst-case linearly polarized strain amplitude h0 of 6.3×10-25, while at the high end of our frequency range we achieve a worst-case upper limit of 3.4×10-24 for all polarizations and sky locations.

AB - 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° in diameter and centered on 20h10m54.71s+33°33′25.29′′, and the other (B) is 7.45° in diameter and centered on 8h35m20.61s-46°49′25.151′′. We explored the frequency range of 50-1500 Hz and frequency derivative from 0 to -5×10-9 Hz/s. A multistage, loosely coherent search program allowed probing more deeply than before in these two regions, while increasing coherence length with every stage. Rigorous follow-up parameters have winnowed the 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% C.L. upper limit on the worst-case linearly polarized strain amplitude h0 of 6.3×10-25, while at the high end of our frequency range we achieve a worst-case upper limit of 3.4×10-24 for all polarizations and sky locations.

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U2 - 10.1103/PhysRevD.93.042006

DO - 10.1103/PhysRevD.93.042006

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JO - Physical Review D

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