Image Details
Caption: Figure 4.
Astrometric precision of the four Mosaic-3 CCDs, computed by matching stars detected in the MzLS images with those in Gaia DR1 catalog. In each panel, the gray scales show the distribution of the differences (in units of arcseconds) between the derived positions (using the WCS) of the centroids of bright stars on a Mosaic-3 CCD and their positions in the Gaia DR1 catalog.
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