Fast follow-up using accelerated likelihood evaluation

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• Jonathan Gair (IoA)
• Wednesday 08 May 2013, 13:45-14:15
• Sackler Lecture Theatre, IoA.

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The calculation of posterior parameter distributions using Bayesian techniques requires repeated likelihood evaluations and can therefore be both computationally expensive and time-consuming. We will describe an approach to faster likelihood evaluation based on reduced order quadratures. A reduced spanning basis for the model space is first constructed and then a quadrature rule for that reduced basis is developed. The quadrature rule is typically cheaper to evaluate than the full likelihood, allowing accelerated follow-up. We discuss the application of these techniques to the follow-up of gravitational wave candidates identified by the LIGO interferometers.

This talk is part of the Institute of Astronomy Seminars series.

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• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
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• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Seminars
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• Sackler Lecture Theatre, IoA

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