Atacama Cosmology Telescope (ACT)

Product Name
Derived CMB Products from the 2008 Data


ΛCDM cosmological parameter chains obtained from the combination of the full WMAP mission, ACT and SPT 2013 temperature data, and a prior on the optical depth to reionization of tau = 0.06 +- 0.01 based on Planck HFI 2016 low-ell polarization.

A non-zero neutrino mass of 0.06eV is assumed as a baseline.

These constraints update the analysis presented in Calabrese et al 2013 and are reported in Calabrese et al 2017.

We recommend these new results being used when comparing WMAP9+ACT+SPT with other surveys.

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A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason