**➥ Tip!** Refine or expand your search. Authors are sometimes listed as 'Smith, J. K.' instead of 'Smith, John' so it is useful to search for last names only. Note this is currently a simple phrase search.

[ascl:1909.008]
RascalC: Fast code for galaxy covariance matrix estimation

RascalC quickly estimates covariance matrices from two- or three-point galaxy correlation functions. Given an input set of random particle locations and a two-point correlation function (or input set of galaxy positions), RascalC produces an estimate of the associated covariance for a given binning strategy, with non-Gaussianities approximated by a ‘shot-noise-rescaling’ parameter. For the 2PCF, the rescaling parameter can be calibrated by dividing the particles into jackknife regions and comparing sample to theoretical jackknife covariance. RascalC can also be used to compute Legendre-binned covariances and cross-covariances between different two-point correlation functions.

[ascl:1909.005]
HADES: Hexadecapolar Analysis for Dust Estimation in Simulations (of CMB B-mode thermal dust emission)

HADES analyzse dust levels in simulated CMB galactic dust maps with realistic experimental noise and lensing configurations. It allows detection of dust via its anisotropy properties in CMB B-modes. It also includes techniques for computing null-tests and a rudimentary technique for dedusting.

[ascl:2005.020]
HIPSTER: HIgh-k Power Spectrum EstimatoR

HIPSTER (HIgh-k Power Spectrum EstimatoR) computes small-scale power spectra and isotropic bispectra for cosmological simulations and galaxy surveys of arbitrary shape. The code computes the Legendre multipoles of the power spectrum, *P _{ℓ}(k)*, or bispectrum

[ascl:2105.014]
encore: Efficient isotropic 2-, 3-, 4-, 5- and 6-point correlation functions

Philcox, Oliver H. E.; Slepian, Zachary; Hou, Jiamin; Warner, Craig; Cahn, Robert N.; Eisenstein, Daniel J.

encore (Efficient *N*-point Correlator Estimation) estimates the isotropic NPCF multipoles for an arbitrary survey geometry in *O*(*N*^{2}) time, with optional GPU support. The code features support for the isotropic 2PCF, 3PCF, 4PCF, 5PCF and 6PCF, with the option to subtract the Gaussian 4PCF contributions at the estimator level. For the 4PCF, 5PCF and 6PCF algorithms, the runtime is dominated by sorting the spherical harmonics into bins, which has complexity *O*(*N*_galaxy x *N*_bins^{3} x *N*_ell^{5}) [4PCF], *O*(*N*_galaxy x N_bins^{4} x N_ell^{8}) [5PCF] or *O*(*N*_galaxy x *N*_bins^{5} x *N*_ell^{11}) [6PCF]. The higher-point functions are slow to compute unless *N*_bins and *N*_ell are small.