Fast and accurate computation of projected two-point functions
Fast and accurate computation of projected two-point functions
We present the two-point function from the fast and accurate spherical Bessel transformation (2-FAST) algorithm for a fast and accurate computation of integrals involving one or two spherical Bessel functions. These types of integrals occur when projecting the galaxy power spectrum $P(k)$ onto the configuration space, ${\ensuremath{\xi}}_{\ensuremath{\ell}}^{\ensuremath{\nu}}(r)$, or spherical harmonic …