mask

This file describes the bright star mask of a subsample of the large-scale structure sample in terms of spherical polygons (the concept is explained well at the mangle site). For each polygon, say which polygon in the window it belongs to.

This file can be read in using the 

read_fits_polygons

tool in idlutils.

The columns are:

  1. XCAPS[3,N]: directions for each cap (as specified in the mangle documentation)
  2. CMCAPS[N]: size of each cap (as specified in the mangle documentation)
  3. NCAPS: number of caps
  4. WEIGHT: weight assigned to each cap (ignore this)
  5. STR: area of each cap in steradians
  6. USE_CAPS: bitmask designating which caps to use
  7. IWINDOW: which polygon (zero-indexed) in the window it belongs to.

NYU Value-Added Galaxy Catalog

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