Estimating the bispectrum of the Very Small Array data

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dc.creatorSmith, Sarah
dc.creatorRocha, Graca
dc.creatorChallinor, Anthony
dc.creatorBattye, Richard A.
dc.creatorCarreira, Pedro
dc.creatorCleary, Kieran
dc.creatorDavies, Rod D.
dc.creatorDavis, Richard J.
dc.creatorDickinson, Clive
dc.creatorGenova-Santos, Ricardo
dc.creatorGrainge, Keith
dc.creatorGutierrez, Carlos M.
dc.creatorHafez, Yaser A.
dc.creatorHobson, Michael P.
dc.creatorJones, Michael E.
dc.creatorKneissl, Rudiger
dc.creatorLancaster, Katy
dc.creatorLasenby, Anthony
dc.creatorLeahy, J. P.
dc.creatorMaisinger, Klaus
dc.creatorPooley, Guy G.
dc.creatorRajguru, Nutan
dc.creatorRebolo, Rafael
dc.creatorRubino-Martin, Jose Alberto
dc.creatorMolina, Pedro Sosa
dc.creatorSaunders, Richard D. E.
dc.creatorSavage, Richard S.
dc.creatorScott, Paul
dc.creatorSlosar, Anze
dc.creatorTaylor, Angela C.
dc.creatorTitterington, David
dc.creatorWaldram, Elizabeth
dc.creatorWatson, Robert A.
dc.date2004-01-29
dc.date2004-05-04
dc.date.accessioned2026-07-07T02:12:03Z
dc.date.available2026-07-07T02:12:03Z
dc.descriptionWe estimate the bispectrum of the Very Small Array data from the compact and extended configuration observations released in December 2002, and compare our results to those obtained from Gaussian simulations. There is a slight excess of large bispectrum values for two individual fields, but this does not appear when the fields are combined. Given our expected level of residual point sources, we do not expect these to be the source of the discrepancy. Using the compact configuration data, we put an upper limit of 5400 on the value of f_NL, the non-linear coupling parameter, at 95 per cent confidence. We test our bispectrum estimator using non-Gaussian simulations with a known bispectrum, and recover the input values.
dc.description17 pages, 16 figures, replaced with version accepted by MNRAS. Primordial bispectrum recalculated and figure 11 changed
dc.identifierhttps://arxiv.org/abs/astro-ph/0401618
dc.identifierhttp://arxiv.org/abs/astro-ph/0401618
dc.identifierMon.Not.Roy.Astron.Soc. 352 (2004) 887
dc.identifierdoi:10.1111/j.1365-2966.2004.07885.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7324
dc.subjectAstrophysics
dc.titleEstimating the bispectrum of the Very Small Array data
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