Identification and mitigation of narrow spectral artifacts that degrade searches for persistent gravitational waves in the first two observing runs of Advanced LIGO


P. Covas, University of Illinois at Urbana–Champaign
A. Effler, California Institute of Technology
E. Goetz, Max Planck Society
P. Meyers, University of Minnesota
A. Neunzert, University of Michigan
M. Oliver, University of the Balearic Islands
B. Pearlstone, University of Glasgow
V. Roma, University of Oregon
R. Schofield, University of Oregon
V. Adya, Max Planck Society
P. Astone, Sapienza University of Rome
S. Biscoveanu, Monash University
T. Callister, California Institute of Technology
N. Christensen, Carleton College
A. Colla, Sapienza University of Rome
E. Coughlin, Carleton College
M. Coughlin, Carleton College
S. Crowder, University of Minnesota
S. Dwyer, National Science Foundation
S. Hourihane
S. Kandhasamy, University of Mississippi
W. Liu, Nagoya University
A. Lundgren, Max Planck Society
A. Matas, University of Minnesota
R. McCarthy, State University of New York System
J. McIver, University of Massachusetts Amherst
G. Mendell, National Science Foundation
R. Ormiston, University of Minnesota
C. Palomba, Istituto Nazionale di Fisica Nucleare
O. Piccinni, Sapienza University of Rome
K. Rao
K. Riles, University of Michigan
L. Sammut, University of Melbourne
S. Schlassa, Carleton College
D. Sigg, Louisiana State University
N. Strauss, Carleton College
D. Tao, Carleton College
K. Thorne, California Institute of Technology
E. Thrane, Monash University, Clayton campus
S. Trembath-Reichert
B. Abbott, California Institute of Technology
R. Abbott, California Institute of Technology
T. Abbott, California State University, Fullerton
C. Adams, California Institute of Technology
R. Adhikari, California Institute of Technology
A. Ananyeva, California Institute of Technology
S. Appert, California Institute of Technology
K. Arai, California Institute of Technology
S. Aston, California Institute of Technology

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Searches are under way in Advanced LIGO and Virgo data for persistent gravitational waves from continuous sources, e.g. rapidly rotating galactic neutron stars, and stochastic sources, e.g. relic gravitational waves from the Big Bang or superposition of distant astrophysical events such as mergers of black holes or neutron stars. These searches can be degraded by the presence of narrow spectral artifacts (lines) due to instrumental or environmental disturbances. We describe a variety of methods used for finding, identifying and mitigating these artifacts, illustrated with particular examples. Results are provided in the form of lists of line artifacts that can safely be treated as non-astrophysical. Such lists are used to improve the efficiencies and sensitivities of continuous and stochastic gravitational wave searches by allowing vetoes of false outliers and permitting data cleaning.


Physical Review D





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