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[ascl:2406.025] PowerSpecCovFFT: FFTLog-based computation of non-Gaussian analytic covariance of galaxy power spectrum multipoles

PowerSpecCovFFT computes the non-Gaussian (regular trispectrum and its shot noise) part of the analytic covariance matrix of the redshift-space galaxy power spectrum multipoles using an FFTLog-based method. The galaxy trispectrum is based on a tree-level standard perturbation theory but with a slightly different galaxy bias expansion. The code computes the non-Gaussian covariance of the power spectrum monopole, quadrupole, hexadecapole, and their cross-covariance up to kmax ~ 0.4 h/Mpc.

Code site:
https://github.com/archaeo-pteryx/PowerSpecCovFFT
Described in:
https://ui.adsabs.harvard.edu/abs/2023PhRvD.108j3512K
Bibcode:
2024ascl.soft06025K

Views: 233

ascl:2406.025
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