PyCS3

PyCS3 is a software toolbox to estimate time delays between multiple images of gravitationally lensed quasars, developed within the COSMOGRAIL collaboration. This is an update of PyCS, which is no longer maintained.

Proceed to the documentation to get further information. In case of any questions, feel free to open an issue here on GitLab.

Installation

git clone https://gitlab.com/cosmograil/PyCS3
cd PyCS3 
python setup.py install

or if you prefer to install it locally :

python setup.py install --user 

Requirements

PyCS3 requires the following standard python packages :

• matplotlib>=3.4.2
• numpy>=2.3
• scipy>=1.7
• multiprocess>=0.70.16
• scikit-learn>=1.7.2

Example Notebooks and Documentation

The full documentation can be found here.

Example notebooks are located in the notebook folder :

• Importing, exporting and displaying light curves
• Measuring time delays with regdiff and the splines
• Estimating uncertainties with PyCS3

Attribution

If you use this code, please cite the papers indicated in the documentation.

License

PyCS3 is a free software ; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation ; either version 3 of the License, or (at your option) any later version.

PyCS3 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details (LICENSE.txt).