Long gamma-ray bursts (GRBs) have been linked to extreme core-collapse supernovae from massive stars. Gravitational waves (GW) offer a probe of the physics behind long GRBs. We investigate models of long-lived (~10–1000 s) GW emission associated with the accretion disk of a collapsed star or with its protoneutron star remnant. Using data from LIGO’s fifth science run, and GRB triggers from the Swift experiment, we perform a search for unmodeled long-lived GW transients. Finding no evidence of GW emission, we place 90% confidence-level upper limits on the GW fluence at Earth from long GRBs for three waveforms inspired by a model of GWs from accretion disk instabilities. These limits range from FtoFcm-2, depending on the GRB and on the model, allowing us to probe optimistic scenarios of GW production out to distances as far as = 33 Mpc. Advanced detectors are expected to achieve strain sensitivities 10x better than initial LIGO, potentially allowing us to probe the engines of the nearest long GRBs.
Bessis, Daniel; Creighton, Teviet; Daveloza, H.; Diaz, Mario C.; Morriss, S. R.; Mukherjee, Soma; Normandin, M. E.; Ortega Larcher, W.; Puncken, O.; Rakhmanov, M.; Quetschke, Volker; Romano, Joseph D.; Stroeer, A. S.; Stone, Robert; Tang, Lappoon R.; and Torres, Cristina V., "Search for long-lived gravitational-wave transients coincident with long gamma-ray bursts" (2013). Physics and Astronomy Faculty Publications and Presentations. 297.
Physical Review D