2018-12-14

random catalogs are dumb

Kate Storey-Fisher (NYU) and I continue to discuss tools for cosmology. She is working on a new estimator for the correlation function, which is fun! But we were tipped off a month or two ago by Tom Abel (KIPAC) about the point that a non-adaptive Poisson random catalog is pretty much known to be the worst possible way to integrate a function. That is, the random catalogs used for correlation-function estimators are almost certainly the dead-wrong methods. And this also connects to the comments we got by Roman Scoccimarro (NYU) this week about the point that the random–random term in the correlation-function estimators being used in eBOSS take weeks to execute! We discussed this in more detail today, and I made a mental note to check in with our math colleagues in January.

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