Introduction

LiteBIRD is a JAXA-led satellite mission that will map the polarization of the Cosmic Microwave Background over the full sky, searching for the primordial B-mode signature of cosmic inflation. Meeting its requirements relies on detailed end-to-end simulations of the instruments and of the observation process.

The LiteBIRD Simulation Framework (LBS) is the collaboration’s toolkit for those simulations: it turns sky models and instrument descriptions into time-ordered detector data (TOD), injects instrumental noise and systematic effects, and reduces the TOD back into sky maps. The rest of this manual documents these steps part by part.

If you are new to the framework, start with the installation instructions below and then work through the tutorial. If you use LBS in your work, please cite it ([10]).

• Installation
• Using Singularity