ACT (DR6.02) Data Release

ACT DR6.02 Product Links	ACT Telescope on Cerro Toco in the Atacama Desert of northern Chile – view looking into the receiver. Image credit: Mark Devlin
MAPS BEAMS NILC PASSBANDS PSPIPE CHAINS

• A full copy of the data is also stored on NERSC and can be access through globus using the following link:
  https://app.globus.org/file-manager?destination_id=53b2a147-ae9d-4bbf-9d18-3b46d133d4bb&destination_path=%2Fact_dr6%2F
• The link to the web atlas: DR6 Atlas (does not support Safari, Use the (?) - question mark icon for details)
• The link to the likelihoods: act_dr6_mflike likelihood, CMB-only likelihood

Description

Maps and cosmological results from the 90, 150 and 220 GHz data from the 2017-2022 observing seasons of the AdvancedACT camera.

• Description of the frequency maps in temperature and polarization over 19,000 square degrees, the data reduction pipeline and derived maps (Naess et al. 2025)
• Power spectra, measurements of foreground parameters and cosmological constraints on Lambda-CDM (Louis et al. 2025)
• Constraints on extended cosmological models (Calabrese et al. 2025)

The data release is divided up into:

• MAPS: sky maps per frequency, null test maps, co-added maps (both ACT-only and combinations with ACT and Planck)
• BEAMS: harmonic beam profiles for the different maps, including beam profiles that describe the temperature-to-polarization leakage
• NILC: various ACT and Planck sky component maps (CMB blackbody T and E, and Compton y) made using the Needlet-ILC (NILC) algorithm. Also includes sky masks used for the NILC analysis.
• PASSBANDS: passband files that describe the frequency response of the telescope
• PSPIPE: files related to the power spectrum pipeline, including best-fit power spectra, sky masks, covariance matrices and likelihood SACC files
• CHAINS: MCMC chains from the Louis et al. and Calabrese et al. cosmological analyses