PySM generates full-sky simulations of Galactic emissions in intensity and polarization relevant to CMB experiments. It is a large refactor of PySM 2 focused on reducing memory usage, improving performance and run in parallel with MPI.
See the documentation at https://pysm3.readthedocs.io
See changes in CHANGES.rst in the repository.
See CITATION
- Full-sky Models of Galactic Microwave Emission and Polarization (Pan-Experiment Galactic Science Group, 2025)
- The Python Sky Model 3 software (Zonca et al, 2021)
- The Python Sky Model: software for simulating the Galactic microwave sky (Thorne et al, 2017)
See the documentation
- Install with
pip install .or withpip install .[test]to also install the requirements for running tests - Optionally, if you have an MPI environment available and you would like to test the MPI capabilities of PySM, install
mpi4pyandlibsharp, check the documentation link above for more details. - Check code style with
tox -e codestyle - Test with
pytestortox -e test - Building docs requires
pandoc, not the python package, the actualpandoccommand line tool, install it with conda or your package manager - Build docs locally with
tox -e build_docs
For any question or issue with the software open an issue.
- Tag the new version with git
- Make sure
hatchdetects the right version withhatch version - Build with
hatch build - Upload to pypi with
hatch publish - Upload to Github with
git push --tags