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https://hdl.handle.net/2440/111142
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Type: | Journal article |
Title: | First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data |
Author: | Abbott, B. Abbott, R. Abbott, T. Acernese, F. Ackley, K. Adams, C. Adams, T. Addesso, P. Adhikari, R. Adya, V. Affeldt, C. Afrough, M. Agarwal, B. Agathos, M. Agatsuma, K. Aggarwal, N. Aguiar, O. Aiello, L. Ain, A. Allen, B. et al. |
Citation: | Physical Review D, 2017; 96(12):122006-1-122006-20 |
Publisher: | American Physical Society |
Issue Date: | 2017 |
ISSN: | 2470-0010 2470-0029 |
Statement of Responsibility: | B. P. Abbott, R. Abbott ... Miftar Ganija ... Won Kim ... David J Ottaway ... Peter J Veitch ... et al. (LIGO Scientific Collaboration and Virgo Collaboration) |
Abstract: | Spinning neutron stars asymmetric with respect to their rotation axis are potential sources of continuous gravitational waves for ground-based interferometric detectors. In the case of known pulsars a fully coherent search, based on matched filtering, which uses the position and rotational parameters obtained from electromagnetic observations, can be carried out. Matched filtering maximizes the signal-to-noise (SNR) ratio, but a large sensitivity loss is expected in case of even a very small mismatch between the assumed and the true signal parameters. For this reason, narrow-band analysis methods have been developed, allowing a fully coherent search for gravitational waves from known pulsars over a fraction of a hertz and several spin-down values. In this paper we describe a narrow-band search of 11 pulsars using data from Advanced LIGO’s first observing run. Although we have found several initial outliers, further studies show no significant evidence for the presence of a gravitational wave signal. Finally, we have placed upper limits on the signal strain amplitude lower than the spin-down limit for 5 of the 11 targets over the bands searched; in the case of J1813-1749 the spin-down limit has been beaten for the first time. For an additional 3 targets, the median upper limit across the search bands is below the spin-down limit. This is the most sensitive narrow-band search for continuous gravitational waves carried out so far. |
Rights: | © 2017 American Physical Society |
DOI: | 10.1103/PhysRevD.96.122006 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1103/physrevd.96.122006 |
Appears in Collections: | Aurora harvest 3 Physics publications |
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