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Stacked search for gravitational waves from the 2006 sgr 1900+14 storm

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. and , LIGO Scientific Collaboration (2009) Stacked search for gravitational waves from the 2006 sgr 1900+14 storm. Astrophysical Journal, 701 (2). L68-L74. ISSN 0004-637X

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Abstract

We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with the 2006 March 29 SGR 1900+14 storm. A new search method is used, "stacking" the GW data around the times of individual soft-gamma bursts in the storm to enhance sensitivity for models in which multiple bursts are accompanied by GW emission. We assume that variation in the time difference between burst electromagnetic emission and potential burst GW emission is small relative to the GW signal duration, and we time-align GW excess power time-frequency tilings containing individual burst triggers to their corresponding electromagnetic emissions. We use two GW emission models in our search: a fluence-weighted model and a flat (unweighted) model for the most electromagnetically energetic bursts. We find no evidence of GWs associated with either model. Model-dependent GW strain, isotropic GW emission energy E GW, and γ ≡ E GW/E EM upper limits are estimated using a variety of assumed waveforms. The stacking method allows us to set the most stringent model-dependent limits on transient GW strain published to date. We find E GW upper limit estimates (at a nominal distance of 10 kpc) of between 2 × 1045 erg and 6 × 1050 erg depending on the waveform type. These limits are an order of magnitude lower than upper limits published previously for this storm and overlap with the range of electromagnetic energies emitted in soft gamma repeater (SGR) giant flares.

Item type: Article
ID code: 16927
Notes: Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
Keywords: gamma rays, gravitational waves, pulsars, neutron stars, gravitational wave detectors, mass spectrometers, ray sources, ray bursts, Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
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Depositing user: Strathprints Administrator
Date Deposited: 15 Apr 2010 14:12
Last modified: 12 Mar 2012 11:06
URI: http://strathprints.strath.ac.uk/id/eprint/16927

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