Using the DES Y1 Likelihood
The Dark Energy Survey Y1 likelihood for the shear, clustering, and cross two-point measurements are available in CosmoSIS.
Here are the steps to using it.
1. Install CosmoSIS
Follow the instructions at the top of the main CosmoSIS wiki page.
3. Test-run the likelihood
Then you can run an example of the DES-SV cosmic shear likelihood by doing:
4. Explore further
This will just run a test, calculating the likelihood at a single point in parameter space. To explore the likelihood you can change to a real sampler - details are in
examples/des-y1/params.ini, as are details on what is happening in the likelihood and how to modify and experiment with it. You can also see
examples/des-y1/values.ini for the input parameters, and
examples/des-y1/priors.ini for the priors.
If you are new to CosmoSIS please see our front page for tutorials and reference information.