English: Depth map and observing patches of the Atacama Cosmology Telescope. The gray-scale background is the Planck 353 GHz dust map, illustrating the foreground contamination level. The tin colored contours give the total survey depth up to the 2019 season, going from purple (shallow) to dark red (deep). Selected contour lines are labeled with the corresponding map depth in units µK arcmin (small black font). The ACT patches are outlined with thick rectangles. Red rectangles indicate MBAC patches, magenta indicates ACTPol patches and blue indiates Advanced ACT patches. The patch name is given in the same color, roughly in the middle of the patch.
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Captions
Observing patches of the Atacama Cosmology Telescope overlaid on its depth map and a dust map from Planck