The SWIFT BAT Software Guide Version 6.3 30 ... - HEASARC - Nasa

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D.11. BATHOTPIX 151 (keepfract = 0.98) [real ] Fraction of non-zero detectors to select as good, initially. (guardfract = 0.25) [real ] Fractional amount to enlarge initially selected detectors, relative to the median value. A value of 0.25 indicates an enlargement of 0.25 x the median on both sides of the distribution. (guardval = 5.0) [real ] Further amount to enlarge the selection window, this time in counts. This keyword is present for the case of an image with very small dynamic range, where guardfract may be too small to be effective. (applygaps = yes) [boolean ] If yes, then positions of BAT detector gaps are excised. (mergemask = yes) [boolean ] If yes, then the input mask is merged with the result before writing to the output. If no, then only the pixels adjusted within this run of bathotpix are written. (zerothresh = 20.0) [real ] Threshold value. If the median is above zerothresh, then pixels with zero are considered to be COLD. If the median is below zerothresh, i.e. the total number of counts is very low, then pixels with zero are considered to be okay. (goodval = 0) [integer ] Value to be used in detector mask maps to indicate a good pixel. (badval = 1) [integer ] Value to be used in detector mask maps to indicate a bad pixel, such as a detector gap. (hotval = 1) [integer ] Value to be used in detector mask maps to indicate a hot pixel. (coldval = 1) [integer ] Value to be used in detector mask maps to indicate a cold pixel. (clobber = NO) [boolean ] If the output file already exists, then setting “clobber = yes” will cause it to be overwritten. (chatter = 1) [integer, 0 - 5 ] Controls the amount of informative text written to standard output. Setting chatter = 1 produces a basic summary and image statistics; chatter = 2 (default) additionally prints a summary of input parameters; chatter = 3 prints detailed information on which hot and cold detectors; chatter = 5 prints debugging information. (history = YES) [boolean ] If history = YES, then a set of HISTORY keywords will be written to the header of the specified HDU in the output file to record the value of all the task parameters that were used to produce the output file.
152 APPENDIX D. BAT SOFTWARE TOOL REFERENCE D.11.5 EXAMPLES 1. Locate hot pixels in a detector plane image bathotpix image.dpi image.mask 2. Same as example 1, but an input mask is also supplied bathotpix image.dpi image.mask detmask=apriori.mask D.11.6 SEE ALSO batgse2dpi D.11.7 LAST MODIFIED Aug 2006
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vi CONTENTS D.1.6 SEE ALSO . . . .
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viii CONTENTS D.10.2 USAGE . . . .
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