(Up to the [wiki:IPP_for_PS1 IPP for PS1])

Magic has continued to trigger on structures in the images.  We have made another pass on the camera to identify and mask structures caused by hot columns, varying vignetting, and turned down edges.

Below are the masked-fraction images for the new mask with and without the vignetted region shown. 

masked fraction (full focal plane): 0.107

[[Image(mask-full-focalplane.jpg)]]

masked fraction (unvignetted region): 0.056

[[Image(mask-unvignetted.jpg)]]