ACT DR6 main release
March 18, 2025·
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1 min read
Gerrit S. Farren
The ACT collaboration has released the DR6 maps, power spectra, likelihoods, and the corresponding cosmological constraints — a milestone the collaboration has been building toward for years. The main papers:
- DR6 power spectra, likelihoods and ΛCDM parameters (Louis et al.)
- DR6 constraints on extended cosmological models (Calabrese et al.)
- DR6 maps (Naess et al.)

Authors
Gerrit S. Farren
(he/him)
Cosmologist & Data Scientist | Mapping the Universe at Scale
Cosmologist working on multi-probe analyses of the largest cosmological datasets. I build large scale analysis pipelines that combine Bayesian inference, distributed/HPC computing, and careful systematics control to turn modern survey data into robust physical insight.