autolens 2026.5.29.4

Open-Source Strong Lensing

PyAutoLens-JAX: Open-Source Strong Lensing

Installation Guide | readthedocs | Introduction on Colab | HowToLens

When two or more galaxies are aligned perfectly down our line-of-sight, the background galaxy appears multiple times.

This is called strong gravitational lensing and PyAutoLens makes it simple to model strong gravitational lenses, using JAX to accelerate lens modeling on GPUs.

🤖 Prototype: autolens_assistant is an early-stage AI assistant you talk to in natural language to do lens modeling end-to-end. It is experimental and not the recommended starting point — the readthedocs, autolens_workspace, and HowToLens below remain the canonical entry points. Try it if you'd like to drive PyAutoLens by conversation.

Getting Started

The following links are useful for new starters:

• The PyAutoLens readthedocs: which includes an overview of PyAutoLens's core features, a new user starting guide and an installation guide.
• The introduction Jupyter Notebook on Google Colab: try PyAutoLens in a web browser (without installation).
• The autolens_workspace GitHub repository: example scripts covering every PyAutoLens use case.
• The HowToLens GitHub repository: a Jupyter notebook lecture series teaching strong lensing and lens modeling from the ground up.

Community & Support

Support for PyAutoLens is available via our Slack workspace, where the community shares updates, discusses gravitational lensing analysis, and helps troubleshoot problems.

Slack is invitation-only. If you'd like to join, please send an email requesting an invite.

For installation issues, bug reports, or feature requests, please raise an issue on the GitHub issues page.

HowToLens

For users less familiar with gravitational lensing, Bayesian inference and scientific analysis you may wish to read through the HowToLens lectures. These teach you the basic principles of gravitational lensing and Bayesian inference, with the content pitched at undergraduate level and above.

A complete overview of the lectures is provided on the HowToLens readthedocs page, and the notebooks themselves live in the PyAutoLabs/HowToLens repository.

Citations

Information on how to cite PyAutoLens in publications can be found on the citations page.

Contributing

Information on how to contribute to PyAutoLens can be found on the contributing page.

Hands on support for contributions is available via our Slack workspace, again please email to request an invite.