This Fisher code produces forecasts for the LSST 3x2 point functions analysis, or the LSSTxCMB S4 and LSSTxSO 6x2 point functions analyses. It computes the auto and cross correlations of galaxy number density, galaxy shear and CMB lensing convergence.

Requires pathos for multiprocessing (https://pypi.org/project/pathos/):

pip install pathos

Requires classylss for the cosmology (https://classylss.readthedocs.io/en/stable/):

conda install -c bccp classylss

or

pip install classylss

Requires the Monte Carlo library vegas for the CMB lensing noise calculations (https://pypi.org/project/vegas):

pip install vegas

Just clone and run:

python driver_fisher_lsst.py

You will need to switch the "save" flags to True, and uncomment any plotting comment you like to generate the plots.

Hope you find this code useful! Please cite https://arxiv.org/abs/2007.12795 if you use this code in a publication. Do not hesitate to contact me with any question: [email protected]