QC workshop

1
QC workshop

• Goals implement QC tools and have a demo of what
  we have reached by end of the week (i.e.
  Thursday)
• Learn each other new developpements at OAC,
  Munich and Groningen
• Discuss and agree on open issues related to QC

2
1) QC based on subwindows

• Alfredo, Ewout, Fedor, Philippe, Roberto, Danny
• 1.a.) Methods Bias, Flats (Dome, Twilight,
  MasterFlat, Fringes), Reduced images
• 1.b) Implementation of SubWinStat in the
  Database and AWBASE i.e. Move the SubWinStat
  versions of
• RawFrame.py
• BiasFrame.py
• DomeFlatFrame.py
• TwilightFlatFrame.py
• MasterFlatFrame.py
• from Experimental to AWBASE

3
Things to discuss

• What's the size of the sub-windows (should be
  always the same? start/end at the same pixels),
  overscan/not-overscan corrected images
• When do we run the image statistics?
  systematically/interactively ?
• Science frames do we remove the objects before
  SubWinStat?
• Verify, compare, inspect, trend analysis how,
  how often?
• Verify compare SubWinStat for different windows
  in a single frame
• Compare compare SubWinStat for the same window
  in different frames
• Inspect always an inspect available for the
  user?
• Trend analysiscompare in it's most general form
  anything is allowed/possible

4
2) Photometry QC

• Ronald, Mark, Roberto
• Catalog creation star IDs (linked to astrometry
  QC), reject bad stars/pixels/artefacts
  
• Choice of aperture to account for differences in
  seeing
• Zeropoints
• Atmospheric extinction ?
• Illumination correction? 2nd standards, SDSS

5
Photometry QC

• Progress concerning aperture photometry?
• QC tool for color terms (OAC)?
• Suggestions for the inspect in photometry QC
• Feedback on the Photometric Software design
  document?

6

• 3) QC image pipeline - PSF Ewout, Edwin, Mark,
  Roberto, Jan
• 4) Astrometry QC Erik
• Rms and max ref stars residuals
• Stdev on polynomial parameters
  
• Covariance Matrix
• Residuals