Simons Observatory Lensing Pipeline

This documentation will walk you through the process of transforming microwave sky maps into a measurement of the CMB lensing power spectrum and cosmological parameters. Broadly, this is achieved by passing a co-added map through a quadratic estimator, calculating its power spectrum, debiasing it with simulations and MCMC sampling for the cosmological parameters.

That sounds simple enough, but with methods that ensure insensitivity to the simulations used and robustness against instrumental and astrophysical systematics, the detailed procedure can be quite complex and computationally intensive. Moreover, a large array of consistency and null tests need to be done to ensure (and iterate on) the quality of the data that is used. This cookbook-style documentaion will guide you through the process.

Note that parts of this documentation strongly overlap with parts of the component separation pipeline, since they share a lot of the pre-processing. The overlapping parts are fully documented here.

Contents:

• 1. Pipeline tasks
  • 1.1. Preparation
  • 1.2. Simulation
  • 1.3. Co-addition
  • 1.4. Filtering
  • 1.5. Quadratic Estimator
  • 1.6. Normalization
  • 1.7. Multiplicative verification
  • 1.8. Bias subtraction
  • 1.9. Covariance
  • 1.10. Exploration and validation
  • 1.11. Cosmological constraints
• 2. Staging and parallelization
  • 2.1. Example run
• 3. Testing
  • 3.1. Verification
  • 3.2. Null tests
  • 3.3. Bandpower consistency tests

Indices and tables

• Index

• Module Index

• Search Page