Abbott, B. P. and Abbott, 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 Brunett, S. and Cahillane, C. and Callister, T. and Cepeda, C. B. and Chen, Y. and Couvares, P. and Coyne, D. C. and Dergachev, V. and Drever, R. W. P. and Ehrens, P. and Eichholz, J. and Engels, W. and Etzel, T. and Gossan, S. E. and Gushwa, K. E. and Gustafson, E. K. and Hall, E. D. and Heptonstall, A. W. and Isi, M. and Kanner, J. B. and Kells, W. and Kondrashov, V. and Korth, W. Z. and Kozak, D. B. and Lewis, J. B. and Maros, E. and Marx, J. N. and McIntyre, G. and McIver, J. and Meshkov, S. and Patel, P. and Pedraza, M. and Perreca, A. 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. J. and Schmidt, P. 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 Williams, R. D. and Wipf, C. C. and Yamamoto, H. and Zhang, L. and Zucker, M. E. and Zweizig, J. (2017) Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544. Physical Review D, 95 (8). Art. No. 082005. ISSN 2470-0010. doi:10.1103/PhysRevD.95.082005. https://resolver.caltech.edu/CaltechAUTHORS:20170123-093344120
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Abstract
We describe a directed search for continuous gravitational waves in data from the sixth initial LIGO science run. The target was the nearby globular cluster NGC 6544 at a distance of ≈2.7 kpc. The search covered a broad band of frequencies along with first and second frequency derivatives for a fixed sky position. The search coherently integrated data from the two LIGO interferometers over a time span of 9.2 days using the matched-filtering F-statistic. We found no gravitational-wave signals and set 95% confidence upper limits as stringent as 6.0×10^(−25) on intrinsic strain and 8.5×10−6 on fiducial ellipticity. These values beat the indirect limits from energy conservation for stars with characteristic spin-down ages older than 300 years and are within the range of theoretical predictions for possible neutron-star ellipticities. An important feature of this search was use of a barycentric resampling algorithm which substantially reduced computational cost; this method is used extensively in searches of Advanced LIGO and Virgo detector data.
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| Additional Information: | © 2017 American Physical Society. Received 12 July 2016; published 19 April 2017. The authors 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, the Max-Planck-Society (MPS), and the State of Niedersachsen/Germany for support of the construction of Advanced LIGO and construction and operation of the GEO600 detector. Additional support for Advanced LIGO was provided by the Australian Research Council. The authors gratefully acknowledge the Italian Istituto Nazionale di Fisica Nucleare (INFN), the French Centre National de la Recherche Scientifique (CNRS) and the Foundation for Fundamental Research on Matter supported by the Netherlands Organisation for Scientific Research, 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 Council of Scientific and Industrial Research of India, Department of Science and Technology, India, Science & Engineering Research Board (SERB), 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 National Science Centre of Poland, the European Commission, the Royal Society, the Scottish Funding Council, the Scottish Universities Physics Alliance, the Hungarian Scientific Research Fund (OTKA), the Lyon Institute of Origins (LIO), the National Research Foundation of Korea, Industry Canada and the Province of Ontario through the Ministry of Economic Development and Innovation, the Natural Science and Engineering Research Council Canada, Canadian Institute for Advanced Research, the Brazilian Ministry of Science, Technology, and Innovation, Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Russian Foundation for Basic Research, the Leverhulme Trust, the Research Corporation, Ministry of Science and Technology (MOST), Taiwan and the Kavli Foundation. The authors gratefully acknowledge the support of the NSF, STFC, MPS, INFN, CNRS and the State of Niedersachsen/Germany for provision of computational resources. This document has been assigned LIGO Laboratory document number LIGO-P1500225. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Group: | LIGO, Astronomy Department | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Issue or Number: | 8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| DOI: | 10.1103/PhysRevD.95.082005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20170123-093344120 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170123-093344120 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ID Code: | 73610 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deposited By: | Melissa Ray | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deposited On: | 24 Jan 2017 15:55 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Last Modified: | 11 Nov 2021 05:19 |
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