The Atacama Cosmology Telescope
The goals of the ACT project are to study how the universe began, what it is made of, and how it evolved to its current state. This pursuit is part of the field of scientific cosmology in which one asks questions about the Universe on the largest and grandest scales. Over the past two decades, there has been a tremendous flourishing of the field, driven by many excellent astronomical measurements. This has led to the development of a precise and elegant understanding of cosmology.
The Atacama Cosmology Telescope took its final data in 2022 and has been decommissioned. Its data to date have been made public on the NASA LAMBDA data archive.
ACT Data Releases
- ACT DR6 Webinar Recording (overviewing the three papers listed below)
- Latest ACT DR6 Papers
- The CMB maps: Næss, Guan, Duivenvoorden, Hasselfield, Wang et al, 2025.
- The CMB power spectra and fitting to LCDM: Louis, La Posta, Atkins, Jense et al, 2025 .
- Constraints on extensions to LCDM: Calabrese, Hill, Jense, La Posta et al, 2025.
- ACT DR6 Data Products