ACT DR4 Frequency Maps at 98 and 150 GHz presented in Aiola et al. 2020
These 376 FITS files are the maps made with the nighttime 2013(s13) to 2016(s16) data from the ACTPol camera on the ACT telescope at 98(f090) and 150(f150) GHz.
These maps and their properties are described in Aiola et al. (2020) and Choi et al. (2020)
Naming and products
The maps are released both as 2- or 4-way independet splits, used to compute the power spectra, and as inverse-variance map-space co-added.
More detailes availble in Sec. 5 of Aiola et al (2020)
The "map_srcfree", "srcs", and "ivar" maps are calibrated with a single coefficient, which is measured for each field and reported in Choi et al (2020). An extra polarization efficiency parameter is included (and let to vary) in the likelihood analysis and NOT considered here.