SciOp EFOSC2 Report
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General notes:

• The images are not overscan subtracted nor trimmed since there is no standard trimsec or biassec
• A lot of the bad pixels and some columns cancel out in the division of one flatfield by another
• The main bad columns are detected from the ratio image

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  Example Comparisons:

  

  Notes:

  • Picks up the main bad columns (including the one on the left which is not seen by the previous BADPIX mask)
  • The faint column seen at the right of the FLATHIGH image cancels out in the divided image (FLATLOWHIGH) and is not picked up in the BADPIX mask.
  • The two other bad columns at the top right have almost disappeared in the divided image and hence are also not picked up in the BADPIX mask

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  Notes:

  • Picks up the main bad columns from the divided image (including the one on the left which is not seen by the previous BADPIX mask)
  • The "middle" bad column has almost disappeared in the divided image and hence is not masked in the BADPIX mask.
  • The edge of the FOV (seen in the FLATHIGH.fits and the previous BADPIX mask) is not evident in the BADPIX mask made by mkBADPIX.pl This is not important though, since this area will have to be trimmed in the reduction process anyway.

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  Notes:

  • Picks up the main bad column on the left hand side, but not the faint column seen in FLATHIGH.fits since this divides out in the divided image.

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  Send comments to <lgermany@eso.org> Last update: Jun 28, 2003