Credit: Julian Borrill, Berkeley Lab
Cumulative daily maps of the sky temperature and polarization at each frequency showing how the atmosphere and noise integrate down over time. The year-long campaign spanned 129 observation-days during which the ACTpol SS patch was available for a 13-hour constant elevation scan. To make these maps, the signal, noise, and atmosphere observations were combined (including percent level detector calibration error), filtered with a 3rd order polynomial, and binned into pixels.