TY - JOUR

T1 - New veto for continuous gravitational wave searches

AU - Zhu, Sylvia J.

AU - Papa, Maria Alessandra

AU - Walsh, Sinéad

N1 - Funding Information: The DM-off veto procedure was used in [3] , and we thank Sergey Klimenko and Evan Goetz for the review of the application of this new veto to the results of that search. We also thank Andrew Melatos, David Keitel, Greg Ashton and Grant Meadors for useful comments. M. A. P. and S. W. gratefully acknowledge the support from NSF PHY Grant No. 1104902. All computational work for this search was carried out on the ATLAS supercomputing cluster at the Max-Planck-Institut für Gravitationsphysik, Hannover and Leibniz Universität Hannover. The authors thank the LIGO Scientific Collaboration for access to the data and gratefully acknowledge the support of the United States National Science Foundation (NSF) for the construction and operation of the LIGO Laboratory and Advanced LIGO as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, and the Max-Planck-Society (MPS) for support of the construction of Advanced LIGO. Additional support for Advanced LIGO was provided by the Australian Research Council. This document has LIGO ( https://dcc.ligo.org ) DCC No. P1700114.

PY - 2017/12/15

Y1 - 2017/12/15

N2 - We present a new veto procedure to distinguish between continuous gravitational wave (CW) signals and the detector artifacts that can mimic their behavior. The veto procedure exploits the fact that a long-lasting coherent disturbance is less likely than a real signal to exhibit a Doppler modulation of astrophysical origin. Therefore, in the presence of an outlier from a search, we perform a multistep search around the frequency of the outlier with the Doppler modulation turned off (DM-off), and compare these results with the results from the original (DM-on) search. If the results from the DM-off search are more significant than those from the DM-on search, the outlier is most likely due to an artifact rather than a signal. We tune the veto procedure so that it has a very low false dismissal rate. With this veto, we are able to identify as coherent disturbances >99.9% of the 6349 candidates from the recent all-sky low-frequency Einstein@Home search on the data from the Advanced LIGO O1 observing run [LIGO and Virgo Collaborations, Phys. Rev. D 96, 122004 (2017)PRVDAQ2470-001010.1103/PhysRevD.96.122004]. We present the details of each identified disturbance in the Appendix.

AB - We present a new veto procedure to distinguish between continuous gravitational wave (CW) signals and the detector artifacts that can mimic their behavior. The veto procedure exploits the fact that a long-lasting coherent disturbance is less likely than a real signal to exhibit a Doppler modulation of astrophysical origin. Therefore, in the presence of an outlier from a search, we perform a multistep search around the frequency of the outlier with the Doppler modulation turned off (DM-off), and compare these results with the results from the original (DM-on) search. If the results from the DM-off search are more significant than those from the DM-on search, the outlier is most likely due to an artifact rather than a signal. We tune the veto procedure so that it has a very low false dismissal rate. With this veto, we are able to identify as coherent disturbances >99.9% of the 6349 candidates from the recent all-sky low-frequency Einstein@Home search on the data from the Advanced LIGO O1 observing run [LIGO and Virgo Collaborations, Phys. Rev. D 96, 122004 (2017)PRVDAQ2470-001010.1103/PhysRevD.96.122004]. We present the details of each identified disturbance in the Appendix.

UR - http://www.scopus.com/inward/record.url?scp=85039419334&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.96.124007

DO - 10.1103/PhysRevD.96.124007

M3 - Article

AN - SCOPUS:85039419334

VL - 96

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 12

M1 - 124007

ER -