Varying F paper

Release associated with Baptista et al. 2023: https://arxiv.org/abs/2305.07022
where we introduce F (dispersion in the Macquart relation) as a free parameter
instead of a fixed quantity.

Version for Paper Submission

Code required to perform analysis for H0 paper at time of submission.

WIP

This repository is under construction but ready for a DOI.
So here we go.