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  Random template placement and prior information

Röver, C. (2010). Random template placement and prior information. Journal of Physics: Conference Series, 228: 012008.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-44EA-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-44EC-E
Genre: Conference Paper

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0911.5051v1.pdf (Preprint), 440KB
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 Creators:
Röver, Christian1, Author              
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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 Abstract: In signal detection problems, one is usually faced with the task of searching a parameter space for peaks in the likelihood function which indicate the presence of a signal. Random searches have proven to be very efficient as well as easy to implement, compared e.g. to searches along regular grids in parameter space. Knowledge of the parameterised shape of the signal searched for adds structure to the parameter space, i.e., there are usually regions requiring to be densely searched while in other regions a coarser search is sufficient. On the other hand, prior information identifies the regions in which a search will actually be promising or may likely be in vain. Defining specific figures of merit allows one to combine both template metric and prior distribution and devise optimal sampling schemes over the parameter space. We show an example related to the gravitational wave signal from a binary inspiral event. Here the template metric and prior information are particularly contradictory, since signals from low-mass systems tolerate the least mismatch in parameter space while high-mass systems are far more likely, as they imply a greater signal-to-noise ratio (SNR) and hence are detectable to greater distances. The derived sampling strategy is implemented in a Markov chain Monte Carlo (MCMC) algorithm where it improves convergence.

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 Dates: 2010
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 438211
Other: arXiv:0911.5051
DOI: 10.1088/1742-6596/228/1/012008
 Degree: -

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Title: 8th Edoardo Amaldi Conference on Gravitational Waves (Amaldi8)
Place of Event: New York City
Start-/End Date: 2009-06-21 - 2009-06-26

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Title: Journal of Physics: Conference Series
Source Genre: Journal
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Publ. Info: Bristol : IOP Publ.
Pages: - Volume / Issue: 228 Sequence Number: 012008 Start / End Page: - Identifier: ISSN: 1742-6588
CoNE: /journals/resource/111097776606042