Likelihood methods for CMB experiments

Understand

A great deal of experimental effort is currently being devoted to the precise measurements of the cosmic microwave background (CMB) sky in temperature and polarisation.

• Satellites, balloon-borne, and ground-based experiments scrutinize the CMB sky at multiple scales, and therefore enable to investigate not only the evolution of the early Universe, but also its late-time physics with unprecedented accuracy.
• The pipeline leading from time ordered data as collected by the instrument to the final product is highly structured.
• Moreover, it has also to provide accurate estimates of statistical and systematic uncertainties connected to the specific experiment.