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Changes between Version 1 and Version 2 of GPC1_Detrend_Documentation


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Timestamp:
May 14, 2012, 6:06:59 PM (14 years ago)
Author:
watersc1
Comment:

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  • GPC1_Detrend_Documentation

    v1 v2  
    2626
    2727= Detrend types =
    28  * DARK
    29  * DARKTEST
    30  * VIDEODARK
    31  * FLAT
    32  * FLATTEST
    33  * MASK
    34  * VIDEOMASK
    35  * CTEMASK
    36  * FRINGE
    37  * LINEARITY
    38  * NOISEMAP
     28 * DARK. Detrend to remove the camera dark current. 
     29 * DARKTEST. This is an intermediate testing version of a DARK.  It is constructed based on the same recipes as a regular DARK, but will not be accidentally selected for processing when finished (as processing only selects a valid DARK detrend).  However, as detrends are often constructed with this det_type (and then converted to a DARK, or registered as a DARK), filenames often contain this string.
     30 * VIDEODARK. This is a special (currently theoretical) DARK that is constructed from frames that have had video data taken on a cell.  This changes the electronic response of the detector, resulting in a different dark current on the images.
     31 * FLAT.  Detrend to remove the pixel-to-pixel response of the detector.
     32 * FLATTEST.  Similar to a DARKTEST above, this detrend is a FLAT that was constructed with a parallel name to avoid being accidentally used in processing.
     33 * MASK. Manually constructed mask to remove bad areas of the detector.
     34 * VIDEOMASK.  Similar to a VIDEODARK above, but instead of correcting regions with discrepant dark current, these regions are masked out.
     35 * CTEMASK. Automatically constructed mask that contains information about regions with Charge Transfer Efficiency issues. 
     36 * FRINGE. Detrend to remove fringing patterns in the infrared.
     37 * LINEARITY. Manually constructed detrend listing the measured linearity response at low flux levels.
     38 * NOISEMAP. Detrend containing the read noise values as a function of detector position.  The regular noisemaps can be generated through the dettool system.  We currently use boosted noisemaps that require subsequent processing to add these boosts.
    3939
    4040= Using detselect =