Nuisance parameters for large galaxy surveys

TL;DR

This paper discusses the role of nuisance parameters in large galaxy surveys, focusing on intrinsic alignments as a key contamination in weak lensing measurements, highlighting their importance in survey analysis.

Contribution

It provides an overview of nuisance parameters and examines intrinsic alignments as a case study in the context of galaxy surveys.

Findings

Intrinsic alignments can significantly contaminate weak lensing signals

Nuisance parameters are crucial for modeling survey systematics

The lecture emphasizes the importance of accounting for these parameters in data analysis

Abstract

These notes are based on a lecture given at the 2016 Euclid Summer School in Narbonne. I will first give a quick overview of the concept of nuisance parameters in the context of large galaxy surveys. The second part will examine the case study of intrinsic alignments, a potential important contamination of weak lensing observables.