Browsing Department of Materials Science and Metallurgy by Author "Fergusson, James Robert"

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  • Separable projection integrals for higher-order correlators of the cosmic microwave sky: Acceleration by factors exceeding 100 

    Briggs, JP; Pennycook, SJ; Fergusson, James Robert; Jäykkä, J; Shellard, Edward Paul (ElsevierJournal of Computational Physics, 2016-01-19)
    We present a case study describing efforts to optimise and modernise “Modal”, the simulation and analysis pipeline used by the Planck satellite experiment for constraining general non-Gaussian models of the early universe ...

  • Using inpainting to construct accurate cut-sky CMB estimators 

    Gruetjen, HF; Fergusson, James Robert; Liguori, M; Shellard, Edward Paul (American Physical SocietyPhysical Review D - Particles, Fields, Gravitation and Cosmology, 2017-02-23)
    The direct evaluation of manifestly optimal, cut-sky cosmic microwave background (CMB) power spectrum and bispectrum estimators is numerically very costly, due to the presence of inverse-covariance filtering operations. ...