Princeton University Gravity Group Seminar

The Atacama Cosmology Telescope (ACT) is being used to observe the sky at arcminute resolution in both temperature and polarization. The data we collect are then mapped, transformed into power spectra, and used to derive constraints on cosmological parameters. In this talk, rather than focus on ACT data or results, I will go over the intermediate steps in our pipeline, such as how the maps are made, how the beams are measured, and how the power spectra are computed. I will include details and plots from our last data release, DR4 (Aiola et al. 2020 and Choi et al. 2020). I will then give a sneak peek at some of the ACT analysis currently under way.