First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data
Name
PhysRevD.96.122006.pdf
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1.27 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Abbott, B. P.
Abbott, R.
Abbott, T. D.
Acernese, F.
Ackley, K.
Adams, C.
Adams, T.
Addesso, P.
Adhikari, R. X.
Adya, V. B.
Date Issued
December 2017
Journal
Physical Review D
Publisher
American Physical Society
Citation
Abbott, B. P. et al. "First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data." Physical Review D 96, 12 (December 2017): 122006 © 2017 American Physical Society
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
LIGO (Observatory : Massachusetts Institute of Technology)
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.96.122006
