The Atacama Cosmology Telescope: Summary of DR4 and DR5 Data Products and Data Access

TL;DR

This paper summarizes the DR4 and DR5 data releases from the Atacama Cosmology Telescope, detailing the data products, access methods, and analysis tools provided to the public for cosmological research.

Contribution

It provides a comprehensive overview of the latest ACT data releases, including new data products, access procedures, and analysis notebooks for the scientific community.

Findings

Public access to high-resolution temperature and polarization maps

Availability of lensing and component-separated maps covering large sky areas

Provision of derived power spectra, cosmological likelihoods, and galaxy cluster catalog

Abstract

Two recent large data releases for the Atacama Cosmology Telescope (ACT), called DR4 and DR5, are available for public access. These data include temperature and polarization maps that cover nearly half the sky at arcminute resolution in three frequency bands; lensing maps and component-separated maps covering ~ 2,100 deg^2 of sky; derived power spectra and cosmological likelihoods; a catalog of over 4,000 galaxy clusters; and supporting ancillary products including beam functions and masks. The data and products are described in a suite of ACT papers; here we provide a summary. In order to facilitate ease of access to these data we present a set of Jupyter IPython notebooks developed to introduce users to DR4, DR5, and the tools needed to analyze these data. The data products (excluding simulations) and the set of notebooks are publicly available on the NASA Legacy Archive for Microwave Background Data Analysis (LAMBDA); simulation products are available on the National Energy Research Scientific Computing Center (NERSC).