CoLoRe: fast cosmological realisations over large volumes with multiple tracers

Abstract We present CoLoRe , a public software package to efficiently generate synthetic realisations of multiple cosmological surveys. can simulate the growth structure with different degrees accuracy, current implementation supporting lognormal fields, first, and second order Lagrangian perturbation theory. simulates density field on an all-sky light-cone up desired maximum redshift, uses it 2D 3D maps: galaxy positions velocities, lensing (shear, magnification, convergence), integrated Sachs-Wolfe effect, line intensity mapping, sight skewers for simulations Lyman- ? forest. test accuracy simulated maps against analytical theoretical predictions, showcase its performance multi-survey simulation including DESI galaxies quasars, LSST lensing, SKA mapping radio galaxies. expect be particularly useful in studies aiming characterise impact systematics multi-experiment analyses, quantify covariance between datasets, cross-correlation pipelines near-future