Up: IPP at the ROE

IPP Data Reduction Stages

This page is a work in project. Please add if you know more or better.

In order of processing:

• Raw (14 or 15 bits per pixel? In either case, 2 bytes required.)
  • Straight from the telescope
• Chip
  • Images:
    • detrended (5 bytes per pixel: 2 signal, 2 weight, 1 mask. Compresses to 44%)
      • flattened
      • debiased
  • Products:
    • PSF measurement
    • point source catalogues
  • Tools used
• Camera
  • Images
    • Nothing new
  • Products
    • astrometry for entire focal plane
    • some position-dependent masks
  • Tools used
• ( Fake )
  • Images
    • detrended
  • Tools used
• Warp
  • Images
    • Warped to predefined skycells (i.e. images in sky coordinates)
  • Products
    • Remeasured PSF
  • Tools used
• Stack
  • Images
    • Combination of warps (images in sky coordinates) convolved to a common PSF
  • Products
    • Nothing new
  • Tools used
• Diff
  • Images
    • Difference between two frames or a frame and a stack, all in sky coordinates (a.k.a warps)
  • Tools used
• Magic
  • Stripes added to hide high-proper motion objects (satellites and other things which shouldn't be masked)
  • Tools used
• Addstar Stage
  • ?
  • Tools used