Coincidence analysis to search for inspiraling compact binaries using TAMA300 and LISM data

TAMA Collaboration

LISM Collaboration

Kojima Yasufumi

Physical Review D

Japanese laser interferometric gravitational wave detectors, TAMA300 and LISM, performed a coincident observation during 2001. We perform a coincidence analysis to search for inspiraling compact binaries. The length of data used for the coincidence analysis is 275 hours when both TAMA300 and LISM detectors are operated simultaneously. TAMA300 and LISM data are analyzed by matched filtering, and candidates for gravitational wave events are obtained. If there is a true gravitational wave signal, it should appear in both data of detectors with consistent waveforms characterized by masses of stars, amplitude of the signal, the coalescence time and so on. We introduce a set of coincidence conditions of the parameters, and search for coincident events. This procedure reduces the number of fake events considerably, by a factor ~10–4 compared with the number of fake events in single detector analysis. We find that the number of events after imposing the coincidence conditions is consistent with the number of accidental coincidences produced purely by noise. We thus find no evidence of gravitational wave signals. We obtain an upper limit of 0.046 [1/h] (C.L.=90%) to the galactic event rate within 1 kpc from the Earth. The method used in this paper can be applied straightforwardly to the case of coincidence observations with more than two detectors with arbitrary arm directions.

coincidence techniques

binary stars

light interferometry

gravitational waves

stellar mass

gravitational wave detectors

eng

American Physical Society

Copyright (c) 2004 The American Physical Society.

[ISSN] 1550-7998

[DOI] 10.1103/PhysRevD.70.042003

[NCID] AA00773624

[DOI] http://dx.doi.org/10.1103/PhysRevD.70.042003