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Search for gravitational waves from low mass binary coalescences in the first year of LIGO's S5 data

Abbott, B.P. and Abbott, R. and Adhikari, R. and Ajith, P. and Allen, B. and Allen, G. and Amin, R.S. and Anderson, S.B. and Lockerbie, N.A., LIGO Scientific Collaboration (2009) Search for gravitational waves from low mass binary coalescences in the first year of LIGO's S5 data. Physical Review D: Particles and Fields, 79 (12). ISSN 0556-2821

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Abstract

We have searched for gravitational waves from coalescing low mass compact binary systems with a total mass between 2M⊙ and 35M⊙ and a minimum component mass of 1M⊙ using data from the first year of the fifth science run of the three LIGO detectors, operating at design sensitivity. Depending on the mass, we are sensitive to coalescences as far as 150 Mpc from the Earth. No gravitational-wave signals were observed above the expected background. Assuming a population of compact binary objects with a Gaussian mass distribution representing binary neutron star systems, black hole-neutron star binary systems, and binary black hole systems, we calculate the 90% confidence upper limit on the rate of coalescences to be 3.9×10-2  yr-1L10-1, 1.1×10-2  yr-1L10-1, and 2.5×10-3  yr-1L10-1, respectively, where L10 is 1010 times the blue solar luminosity. We also set improved upper limits on the rate of compact binary coalescences per unit blue-light luminosity, as a function of mass.