Published February 5, 2020 | Version v1.0
Software Open

H0LiCOW cosmological parameter sampling software

  • 1. Ecole Polytechnique Fédérale de Lausanne


Python notebook for H0 inference using H0LiCOW collaboration's 6-lens distance measurements.  The python notebook is also available here:

The posterior distributions of the time-delay distances and angular diameter distances for five of the six lens systems can be downloaded here:
The remaining lens (B1608+656) has an analytical fit to the PDF.

If you make use of the distance measurements (time-delay distance and/or lens angular diameter distance) to the 6 lens systems from H0LiCOW, please cite the relevant publications:

The H0 inference from these posteriors can be obtained following the python notebook.  The cosmological parameter chains from running the python notebook are available here:


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Additional details


COSMOGRAIL: Cosmology with Time Delays in Gravitationally Lensed Quasars 200020_172712
Swiss National Science Foundation
COSMICLENS – Cosmology with Strong Gravitational Lensing 787886
European Commission