pysm3 3.4.3

PySM generates full-sky simulations of Galactic emissions in intensity and polarization

PySM 3

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.

Related scientific papers

See CITATION

• Full-sky Models of Galactic Microwave Emission and Polarization at Subarcminute Scales for the Python Sky Model (The PanEx GS Group, ApJ 991, 23, 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)

Install

See the documentation

• Install with pip install . or with pip 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 mpi4py and libsharp, check the documentation link above for more details.

• Check code style with tox -e codestyle

• Test with pytest or tox -e test

• Building docs requires pandoc, not the python package, the actual pandoc command line tool, install it with conda or your package manager

• Build docs locally with tox -e build_docs

Support

For any question or issue with the software open an issue.

Release

• Tag the new version with git

• Make sure hatch detects the right version with hatch version

• Build with hatch build

• Upload to pypi with hatch publish

• Upload to Github with git push --tags