The Swift short gamma-ray burst rate density: prospects for detecting binary neutron star mergers by aLIGO

David Coward; Eric Howell; Tsvi Piran; Giulia Stratta; Marica Branchesi; Omer Bromberg; Bruce Gendre; Ronald Burman; Dafne Guetta

arXiv · 1206.5058

The Swift short gamma-ray burst rate density: prospects for detecting binary neutron star mergers by aLIGO

David Coward·Eric Howell·Tsvi Piran·Giulia Stratta·Marica Branchesi·Omer Bromberg·Bruce Gendre·Ronald Burman·Dafne Guetta

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Abstract

Presently only 30% of short gamma ray bursts (SGRBs) have accurate redshifts, and this sample is highly biased by the limited sensitivity of {\it Swift} to detect SGRBs. We account for the dominant biases to calculate a realistic SGRB rate density out to $z = 0.5$ using the {\it Swift} sample of peak fluxes, redshifts, and those SGRBs with a beaming angle constraint from X-ray/optical observations. Assuming a significant fraction of binary neutron star mergers produce SGRBs, we calculate lower and upper detection rate limits of (1-180) per Yr by an advanced LIGO and Virgo coincidence search. Our detection rate is compatible with extrapolations using Galactic pulsar observations and population synthesis.

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David Coward, Eric Howell, Tsvi Piran, Giulia Stratta, Marica Branchesi, Omer Bromberg, Bruce Gendre, Ronald Burman, Dafne Guetta. 2012-06-22. The Swift short gamma-ray burst rate density: prospects for detecting binary neutron star mergers by aLIGO. https://arxiv.org/abs/1206.5058

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