This cartoon is part of the DES Y3 #Darkbites social media series. It was drawn to illustrate a paper, led by Juan Cordero and Ian Harrison, which describes a new approach to marginalizing over uncertainties in the line-of-sight distribution of galaxies measured by photometric survyes like DES. The paper is called, “Dark Energy Survey Year 3 Results: Marginalisation over redshift distribution uncertainties using ranking of discrete realisations.” (arXiv:2109.09636).


The post’s associated text was:

Measurements of galaxy distance have uncertainty. This means our data are consistent with many possible variations of how galaxies are distributed. We use a method called Hyperrank to summarize those possibilities with just a few numbers.

Here’s a link to the post. The twitter thread of the Y3 Darkbites posts begins here. The cartoons also being shared on the DES facebook and instagram pages.