Implementation of an F-statistic all-sky search for continuous gravitational waves in Virgo VSR1 data
Aasi, J. and Lockerbie, N. A. and Tokmakov, K. V., LIGO Scientific Collaboration, Virgo Collaboration (2014) Implementation of an F-statistic all-sky search for continuous gravitational waves in Virgo VSR1 data. Classical and Quantum Gravity, 31 (16). 165014. ISSN 1361-6382 (https://doi.org/10.1088/0264-9381/31/16/165014)
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Abstract
We present an implementation of the F-statistic to carry out the first search in data from the Virgo laser interferometric gravitational wave detector for periodic gravitational waves from a priori unknown, isolated rotating neutron stars. We searched a frequency f(0) range from 100 Hz to 1 kHz and the frequency dependent spindown f(1) range from -1.6(f(0)/100 Hz) x 10(-9) Hz s(-1) to zero. A large part of this frequency-spindown space was unexplored by any of the all-sky searches published so far. Our method consisted of a coherent search over two-day periods using the F-statistic, followed by a search for coincidences among the candidates from the two-day segments. We have introduced a number of novel techniques and algorithms that allow the use of the fast Fourier transform (FFT) algorithm in the coherent part of the search resulting in a fifty-fold speed-up in computation of the F-statistic with respect to the algorithm used in the other pipelines. No significant gravitational wave signal was found. The sensitivity of the search was estimated by injecting signals into the data. In the most sensitive parts of the detector band more than 90% of signals would have been detected with dimensionless gravitational-wave amplitude greater than 5 x 10(-24).
ORCID iDs
Aasi, J., Lockerbie, N. A. ORCID: https://orcid.org/0000-0002-1678-3260 and Tokmakov, K. V. ORCID: https://orcid.org/0000-0002-2808-6593;-
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Item type: Article ID code: 50708 Dates: DateEvent5 August 2014Published2 July 2014AcceptedNotes: Please consult the manuscript for full attribution details. Subjects: Science > Astronomy
Science > PhysicsDepartment: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 09 Dec 2014 14:47 Last modified: 19 Sep 2024 00:35 URI: https://strathprints.strath.ac.uk/id/eprint/50708