This is the public repository for the Third Gravitational Lensing Accuracy Testing Challenge (GREAT3), a community challenge by the weak lensing community to test methods of inferring weak lensing shear from images.
GREAT3 challenge handbook describing the purpose of the challenge, the challenge dataset, the overall challenge process, and more
GREAT3 challenge results paper describing the main results
GalSim community image simulation software developed initially for the challenge, and now widely used for other purpose
The data may be downloaded from the Pittsburgh Supercomputing Center via Globus or direct download from a web server:
For a full description of the contents of great3-public,
please go into each sub-directory and take a look at the README.md file.
great3-public includes:
The code used to generate the GREAT3 challenge data (in great3sims/)
The scripts used to generate and explore the inputs to the GREAT3 simulation
code (in inputs/)
The metric evaluation code, and scripts used to simulate the performace of a
variety of metrics (in metrics/)
The example data processing scripts that were public throughout the challenge
(in example_scripts/)
The code provided to assist in generating and checking submissions (in
presubmission_script)
Please also see the wiki for more information, an FAQ, and links to downloads for supporting data.