| Abstract: | We present the results of a search for gravitational-wave bursts associated
with 137 gamma-ray bursts (GRBs) that were detected by satellite-based
gamma-ray experiments during the fifth LIGO science run and first Virgo science
run. The data used in this analysis were collected from 2005 November 4 to 2007
October 1, and most of the GRB triggers were from the Swift satellite. The
search uses a coherent network analysis method that takes into account the
different locations and orientations of the interferometers at the three
LIGO-Virgo sites. We find no evidence for gravitational-wave burst signals
associated with this sample of GRBs. Using simulated short-duration (<1 s)
waveforms, we set upper limits on the amplitude of gravitational waves
associated with each GRB. We also place lower bounds on the distance to each
GRB under the assumption of a fixed energy emission in gravitational waves,
with typical limits of D ~ 15 Mpc (E_GW^iso / 0.01 M_o c^2)^1/2 for emission at
frequencies around 150 Hz, where the LIGO-Virgo detector network has best
sensitivity. We present astrophysical interpretations and implications of these
results, and prospects for corresponding searches during future LIGO-Virgo
runs. |
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