Measuring line-of-sight-dependent Fourier-space clustering using FFTs
Measuring line-of-sight-dependent Fourier-space clustering using FFTs
Observed galaxy clustering exhibits local transverse statistical isotropy around the line-of-sight (LOS). The variation of the LOS across a galaxy survey complicates the measurement of the observed clustering as a function of the angle to the LOS, as fast Fourier transforms (FFTs) based on Cartesian grids, cannot individually allow for …