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The goal of the Pangloss project is to understand, model and account for the mass structure along the line of sight to various interesting objects in the Universe, whose apparent position, brightness and shape are all affected by the combined gravitational lensing effect of all that mass between them and us. In particular, we want to make accurate measurements of distances (cosmography) and high redshift luminosity functions, both of which count line of sight structure as one of their most serious systematic errors.
Pangloss is scientific code still under development. If you do want to see what we are doing, and play around with the code, you should contact Phil ([email protected]) to to let us know you are here, and then see the README for more advice.
"Reconstructing Every Galaxy - Is It Worth It, for Lens Cosmography?" Collett et al
This project grew in to our first paper, "Reconstructing the lensing mass in the universe from photometric catalogue data", Collett et al (2013).
"Application to the COSMOGRAIL Lens Sample" Marshall, Suyu, et al
We'll need some way of estimating the systematics introduced by the calibration step...
"Including Groups and Clusters - Can we avoid the calibration step?" Marshall and anyone else
Should be a straightforward extension to include a suitable group catalog. It is to be seen how good such catalogs are though.
"Inferring Dark Mass Hierarchically, from Weak Lensing Data" Vanderplas? Hogg? Marshall, Brewer? etc
This is a big problem to take on...