Studies of Systematic Uncertainties for Simons Observatory: Detector Array Effects

TL;DR

This paper investigates systematic uncertainties in the Simons Observatory's detector system, analyzing effects like leakage, nonlinearity, gain variations, and crosstalk to inform design improvements for precise CMB measurements.

Contribution

It provides a comprehensive modeling and mitigation analysis of detector-related systematic effects for the Simons Observatory.

Findings

Quantified levels of signal contamination from various systematic effects

Proposed mitigation strategies for intensity-to-polarization leakage and other issues

Established instrument requirements to reduce systematic uncertainties

Abstract

In this proceeding, we present studies of instrumental systematic effects for the Simons Obsevatory (SO) that are associated with the detector system and its interaction with the full SO experimental systems. SO will measure the Cosmic Microwave Background (CMB) temperature and polarization anisotropies over a wide range of angular scales in six bands with bandcenters spanning from 27 GHz to 270 GHz. We explore effects including intensity-to-polarization leakage due to coupling optics, bolometer nonlinearity, uncalibrated gain variations of bolometers, and readout crosstalk. We model the level of signal contamination, discuss proposed mitigation schemes, and present instrument requirements to inform the design of SO and future CMB projects.