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First low frequency all-sky search for continuous gravitational wave signals

Aasi, J. and Abbott, R. and Abbott, T. D. and Abernathy, M. R. and Adhikari, R. X. and Anderson, S. B. and Arai, K. and Araya, M. C. and Barayoga, J. C. and Barish, B. C. and Berger, B. K. and Billingsley, G. and Blackburn, J. K. and Bork, R. and Brooks, A. F. and Cepeda, C. and Chakraborty, R. and Chalermsongsak, T. and Coyne, D. C. and Dergachev, V. and Drever, R. W. P. and Driggers, J. C. and Ehrens, P. and Etzel, T. and Gushwa, K. E. and Gustafson, E. K. and Hall, E. D. and Heptonstall, A. W. and Hodge, K. A. and Jacobson, M. B. and Kanner, J. B. and Kells, W. and Kondrashov, V. and Korth, W. Z. and Kozak, D. B. and Lazzarini, A. and Lewis, J. B. and Li, T. G. F. and Mageswaran, M. and Maros, E. and Martynov, D. V. and Marx, J. N. and McIntyre, G. and Meshkov, S. and Pedraza, M. and Price, L. R. and Quintero, E. A. and Reitze, D. H. and Robertson, N. A. and Rollins, J. G. and Sachdev, S. and Sanchez, E. and Schmidt, P. and Shao, Z. and Singer, A. and Smith, N. D. and Smith, R. J. E. and Taylor, R. and Thirugnanasambandam, M. P. and Torrie, C. I. and Vajente, G. and Vass, S. and Wallace, L. and Weinstein, A. J. and Whitcomb, S. E. and Williams, R. D. and Wipf, C. C. and Yamamoto, H. and Zhang, L. and Zweizig, J. and Chen, Y. and Gossan, S. E. and Okounkova, M. and Ott, C. D. and Thorne, K. S. and Vallisneri, M. (2016) First low frequency all-sky search for continuous gravitational wave signals. Physical Review D, 93 (4). Art. No. 042007. ISSN 2470-0010. http://resolver.caltech.edu/CaltechAUTHORS:20160301-082544147

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Abstract

In this paper we present the results of the first low frequency all-sky search of continuous gravitational wave signals conducted on Virgo VSR2 and VSR4 data. The search covered the full sky, a frequency range between 20 Hz and 128 Hz with a range of spin-down between −1.0×10^(−10) Hz/s and +1.5×10^(−11) Hz/s, and was based on a hierarchical approach. The starting point was a set of short Fast Fourier Transforms (FFT), of length 8192 seconds, built from the calibrated strain data. Aggressive data cleaning, both in the time and frequency domains, has been done in order to remove, as much as possible, the effect of disturbances of instrumental origin. On each dataset a number of candidates has been selected, using the FrequencyHough transform in an incoherent step. Only coincident candidates among VSR2 and VSR4 have been examined in order to strongly reduce the false alarm probability, and the most significant candidates have been selected. The criteria we have used for candidate selection and for the coincidence step greatly reduce the harmful effect of large instrumental artifacts. Selected candidates have been subject to a follow-up by constructing a new set of longer FFTs followed by a further incoherent analysis. No evidence for continuous gravitational wave signals was found, therefore we have set a population-based joint VSR2-VSR4 90% confidence level upper limit on the dimensionless gravitational wave strain in the frequency range between 20 Hz and 128 Hz. This is the first all-sky search for continuous gravitational waves conducted at frequencies below 50 Hz. We set upper limits in the range between about 10^(−24) and 2×10^(−23) at most frequencies. Our upper limits on signal strain show an improvement of up to a factor of ∼2 with respect to the results of previous all-sky searches at frequencies below 80 Hz.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1510.03621arXivDiscussion Paper
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.93.042007PublisherArticle
http://dx.doi.org/10.1103/PhysRevD.93.042007DOIArticle
ORCID:
AuthorORCID
Adhikari, R. X.0000-0002-5731-5076
Billingsley, G.0000-0002-4141-2744
Kanner, J. B.0000-0001-8115-0577
Korth, W. Z.0000-0003-3527-1348
Kozak, D. B.0000-0003-3118-8950
Weinstein, A. J.0000-0002-0928-6784
Williams, R. D.0000-0002-9145-8580
Zweizig, J.0000-0002-1521-3397
Ott, C. D.0000-0003-4993-2055
Vallisneri, M.0000-0002-4162-0033
Additional Information:© 2016 American Physical Society. Received 22 October 2015; published 25 February 2016. The authors gratefully acknowledge the support of the United States National Science Foundation (NSF) for the construction and operation of the LIGO Laboratory, as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, the Max Planck Society (MPS), and the State of Niedersachsen/Germany for support of the construction and operation of the GEO600 detector. The authors gratefully acknowledge the Italian Istituto Nazionale di Fisica Nucleare (INFN) and the French Centre National de la Recherche Scientifique (CNRS) for the construction and operation of the Virgo detector and the creation and support of the EGO consortium. The authors also gratefully acknowledge research support from these agencies as well as by the Australian Research Council; the International Science Linkages program of the Commonwealth of Australia; the Council of Scientific and Industrial Research of India, Department of Science and Technology, India; Science and Engineering Research Board, India; Ministry of Human Resource Development, India; the Spanish Ministerio de Economía y Competitividad; the Conselleria d’Economia i Competitivitat and Conselleria d’Educació; Cultura i Universitats of the Govern de les Illes Balears; the Foundation for Fundamental Research on Matter supported by the Netherlands Organisation for Scientific Research; the National Science Centre of Poland; the European Union; the Royal Society; the Scottish Funding Council; the Scottish Universities Physics Alliance; the National Aeronautics and Space Administration; the Hungarian Scientific Research Fund; the Lyon Institute of Origins; the National Research Foundation of Korea; Industry Canada and the Province of Ontario through the Ministry of Economic Development and Innovation; the National Science and Engineering Research Council Canada; the Brazilian Ministry of Science, Technology, and Innovation; the Carnegie Trust; the Leverhulme Trust; the David and Lucile Packard Foundation; the Research Corporation; and the Alfred P. Sloan Foundation. The authors gratefully acknowledge the support of the NSF, STFC, MPS, INFN, CNRS, and the State of Niedersachsen/Germany for the provision of computational resources. The authors are also grateful to the anonymous referees for their comments, which helped to improve the clarity of the paper.
Group:LIGO, TAPIR
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Max-Planck-SocietyUNSPECIFIED
State of Niedersachsen/GermanyUNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Australian Research CouncilUNSPECIFIED
International Science Linkages program of the Commonwealth of AustraliaUNSPECIFIED
Council of Scientific and Industrial Research of IndiaUNSPECIFIED
Department of Science and Technology (India)UNSPECIFIED
Science & Engineering Research Board (SERB)UNSPECIFIED
Ministry of Human Resource Development (India)UNSPECIFIED
Ministerio de Economía y Competitividad (MINECO)UNSPECIFIED
Conselleria d’Economia i CompetitivitatUNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Ministerstwo Nauki i Szkolnictwa Wyższego (MNiSW)UNSPECIFIED
FOCUS Programme of Foundation for Polish ScienceUNSPECIFIED
European UnionUNSPECIFIED
Royal SocietyUNSPECIFIED
Scottish Funding CouncilUNSPECIFIED
NASAUNSPECIFIED
Hungarian Scientific Research Fund (OTKA)UNSPECIFIED
Lyon Institute of Origins (LIO)UNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
Industry CanadaUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Ministério da Ciência, Tecnologia e InovaçãoUNSPECIFIED
Carnegie TrustUNSPECIFIED
Leverhulme TrustUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Research CorporationUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Conselleria d’Educació, Cultura i Universitats of the Govern de les Illes BalearsUNSPECIFIED
Scottish Universities Physics AllianceUNSPECIFIED
Ontario Ministry of Economic Development and InnovationUNSPECIFIED
Classification Code:PACS numbers: 04.80Nn,95.55Ym, 97.60Gb, 07.05Kf
Record Number:CaltechAUTHORS:20160301-082544147
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160301-082544147
Official Citation:First low frequency all-sky search for continuous gravitational wave signals J. Aasi et al. (LIGO Scientific Collaboration and Virgo Collaboration) Phys. Rev. D 93, 042007 (2016) – Published 25 February 2016
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64892
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:01 Mar 2016 21:41
Last Modified:20 Nov 2017 22:02

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