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% @(#)testf2ccd.hlq 19.1 (ESO-SDAG) 02/25/03 14:16:57
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%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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%.COPYRIGHT (c) 1994 European Southern Observatory
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%.KEYWORDS MIDAS, ccd package, flat, testing
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%.PURPOSE On-line help file for the command: TESTF2/CCD
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%.VERSION 940620 RHW created
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%.VERSION 940816 RHW split into single subroutines
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%---------------------------------------------------------------------
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TESTF2/CCD 20-Jun-1994 RHW
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TESTF2/CCD in_frm [out_id] [area] [thresh] [option]
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Find the cold pixels in the combined low count flat.
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Find the cold pixels in the combined low count flat.
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TESTFA/CCD in_frm [out_id] [area] [thesh] [option]
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in_frm = input low count flat field, possibly created using the
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command TESTF1/CCD. No default.
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out_id = output identifier for the output of the test prodedure.
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All output (i.e. frames, listings and plots) will start
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with this identifier. Default is FLAT.
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area = area of the input frames in which the pixels will be
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considered. Default is the whole image area.
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thresh = fraction of the median count rate in the master flat
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frame below which intensities are considered to be
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generated from cold pixels on the detector. Default is 0.20.
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option = Option to enable overwriting the existing median filtering
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input frame. Default is `N' (i.e. no overwrite).
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The command will list all pixels in the stacked master flat frame that
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show values less than thresh times the median counts in the frame.
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Only pixels within the area contained in `area' are considered and
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repetitions of cold pixels in the increasing y coordinate are not
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The command will stored the outputs in a number of ascii and
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postscript files (preceding by the identification string out_id):\\
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`out_id'_coldpix.tbl: MIDAS table containing the cold pixels;\\
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`out_id'_coldpix.txt: a ascii tablke containing the cold pixels.\\
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The full test on the low count flat field is done by the command
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For more details about the various combining methods, please refer
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to the CCD Chapter in Volume B of the ESO-MIDAS Users' Guide.
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TESTFA/CCD, SET/CCD, SHOW/CCD, FILTER/MEDIAN, FIND/PIXEL
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TESTF2/CCD FMASTER FMASTER ? 0.20 Y
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Find all cold pixels with less than 20 percent of the median pixel
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value in the combine flat. Is the input frame was already median
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filtered overwrite the filtered frame and create a new one.