Aasi, J. and Abadie, J. and Abbott, B. P. and Abbott, R. and Abbott, T. and Abernathy, M. R. and Adhikari, R. X. and Ajith, P. and Anderson, R. A. and Anderson, S. B. and Arai, K. and Araya, M. C. and Austin, L. and Barayoga, J. C. and Billingsley, G. and Black, E. 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 Daubert, B. and Dergachev, V. and Driggers, J. C. and Ehrens, P. and Etzel, T. and Fotopoulos, N. and Gushwa, K. E. and Gustafson, E. K. and Hall, E. and Harms, J. and Heefner, J. and Heptonstall, A. W. and Hodge, K. A. and Ivanov, A. and Jacobson, M. and James, E. and Kalmus, P. and Kells, W. and King, P. J. and Kondrashov, V. and Korth, W. Z. and Kozak, D. and Lazzarini, A. and Lewis, J. B. and Litvine, V. and Lloyd, D. and Mageswaran, M. and Mailand, K. and Maros, E. and Martini, G. and Martynov, D. and Marx, J. N. and McIntyre, G. and Meshkov, S. and Nash, T. and Ogin, G. H. and Osthelder, C. and Pedraza, M. and Phelps, M. and Poux, C. and Price, L. R. and Privitera, S. and Quintero, E. and Raymond, V. and Reitze, D. H. and Robertson, N. A. and Rollins, J. G. and Sannibale, V. and Seifert, F. and Singer, A. and Singer, L. and Smith, M. R. and Smith-Lefebvre, N. D. and Taylor, R. and Thirugnanasambandam, M. P. and Thrane, E. and Torrie, C. I. and Vass, S. and Wallace, L. and Weinstein, A. J. and Williams, R. and Yamamoto, H. and Yeaton-Massey, D. and Zhang, L. and Zweizig, J. and Chen, Y. and Gossan, S. and Hong, T. and Kaufman, K. and Luan, J. and Miao, H. and Thorne, K. S. and Vallisneri, M. and Yang, H. and Drever, R. W. P. (2015) Searching for stochastic gravitational waves using data from the two colocated LIGO Hanford detectors. Physical Review D, 91 (2). Art. No. 022003. ISSN 2470-0010. doi:10.1103/PhysRevD.91.022003. https://resolver.caltech.edu/CaltechAUTHORS:20150317-110958591
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Abstract
Searches for a stochastic gravitational-wave background (SGWB) using terrestrial detectors typically involve cross-correlating data from pairs of detectors. The sensitivity of such cross-correlation analyses depends, among other things, on the separation between the two detectors: the smaller the separation, the better the sensitivity. Hence, a colocated detector pair is more sensitive to a gravitational-wave background than a noncolocated detector pair. However, colocated detectors are also expected to suffer from correlated noise from instrumental and environmental effects that could contaminate the measurement of the background. Hence, methods to identify and mitigate the effects of correlated noise are necessary to achieve the potential increase in sensitivity of colocated detectors. Here we report on the first SGWB analysis using the two LIGO Hanford detectors and address the complications arising from correlated environmental noise. We apply correlated noise identification and mitigation techniques to data taken by the two LIGO Hanford detectors, H1 and H2, during LIGO’s fifth science run. At low frequencies, 40–460 Hz, we are unable to sufficiently mitigate the correlated noise to a level where we may confidently measure or bound the stochastic gravitational-wave signal. However, at high frequencies, 460–1000 Hz, these techniques are sufficient to set a 95% confidence level upper limit on the gravitational-wave energy density of Ω(f)<7.7×10^(−4)(f/900 Hz)^3, which improves on the previous upper limit by a factor of ∼180. In doing so, we demonstrate techniques that will be useful for future searches using advanced detectors, where correlated noise (e.g., from global magnetic fields) may affect even widely separated detectors.
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| Additional Information: | © 2015 American Physical Society. Received 4 November 2014; published 8 January 2015. The authors gratefully acknowledge the support of the U.S. National Science Foundation for the construction and operation of the LIGO Laboratory, the Science and Technology Facilities Council of the United Kingdom, the Max-Planck-Society, and the State of Niedersachsen/Germany for support of the construction and operation of the GEO600 detector, and the Italian Istituto Nazionale di Fisica Nucleare and the French Centre National de la Recherche Scientifique for the construction and operation of the Virgo detector. The authors also gratefully acknowledge the support of the research by these agencies and by the Australian Research Council, the International Science Linkages program of the Commonwealth of Australia, the Council of Scientific and Industrial Research of India, the Istituto Nazionale di Fisica Nucleare of Italy, the Spanish Ministerio de Economía y Competitividad, the Conselleria d'Economia Hisenda i Innovació of the Govern de les Illes Balears, the Foundation for Fundamental Research on Matter supported by the Netherlands Organisation for Scientific Research, the Polish Ministry of Science and Higher Education, the FOCUS Programme of Foundation for Polish Science, the Royal Society, the Scottish Funding Council, the Scottish Universities Physics Alliance, The National Aeronautics and Space Administration, OTKA of Hungary, 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 National Science and Engineering Research Council Canada, the Carnegie Trust, the Leverhulme Trust, the David and Lucile Packard Foundation, the Research Corporation, and the Alfred P. Sloan Foundation. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Group: | LIGO | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Issue or Number: | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Classification Code: | PACS: 95.85.Sz, 04.80.Nn, 07.05.Kf, 97.60.Jd | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| DOI: | 10.1103/PhysRevD.91.022003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20150317-110958591 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150317-110958591 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Official Citation: | Searching for stochastic gravitational waves using data from the two colocated LIGO Hanford detectors J. Aasi et al. (LIGO Scientific Collaboration and Virgo Collaboration) Phys. Rev. D 91, 022003 (2015) – Published 8 January 2015 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ID Code: | 55854 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deposited By: | Ruth Sustaita | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deposited On: | 17 Mar 2015 19:19 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Last Modified: | 10 Nov 2021 20:51 |
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